Cheesy Zucchini Casserole: A Hearty Meatless Main or Side

If you're looking for a meatless main dish that actually feels like a full meal, this cheesy zucchini casserole is about to become your new favorite. It's packed with hearty rice, fresh garden zucchini, and plenty of sharp cheddar cheese to keep even the pickiest eaters coming back for seconds. Whether you serve it as the star of the show or as a savory side, this easy bake is the ultimate comfort food for a busy weeknight.

😍Why you'll love this cheesy zucchini casserole

This cheesy zucchini casserole is the ultimate solution for a busy weeknight when you need a meal that's both comforting and easy to prep. By combining the mild flavor of fresh zucchini with hearty rice and extra sharp cheddar, you get a dish that tastes indulgent but is packed with wholesome ingredients. It’s a versatile favorite that works just as well as a standalone vegetarian dinner as it does a kid-approved side.

🌿A nutrtitious and filling meatless main

Choosing this cheesy zucchini casserole as a main dish is a great way to sneak more greens into your family dinner. Zucchini is naturally low in calories and high in antioxidants. The rice and eggs provide the protein and fiber needed to keep you full. Using a high-quality, extra-sharp cheddar allows you to get a massive punch of flavor and calcium in every bite, making it a nutritious win for the whole family.

🥒What to pair with zucchini and rice casserole

While this easy recipe is hearty enough to lead the meal, this cheesy zucchini casserole also pairs beautifully with a variety of proteins. It's the perfect companion to Air Fried Pizza Stuffed Chicken, baked ham, or even a simple side of fish sticks for a kid-approved dinner. If you’re serving it as part of a larger spread, it complements Mediterranean Bean Salad or Pickled Beet Salad perfectly, making it a go-to recipe for everything from casual Mondays to backyard BBQs.

🥘Ingredients for cheesy zucchini casserole

• fresh zucchini- it's parboiled first to soften it a bit, then chopped
• cooked rice- choose microwavable rice for a super time-saver
• extra sharp cheddar cheese- you can choose to grate this yourself for better taste and melting quality, but to save time, I suggest using shredded
• green onion- for added flavor
• dried rosemary & parsely- beautifully accents the flavors in this dish
• extra virgin olive oil- just a touch is used for richness
• egg- binds all the ingredients together

🔪How to make cheesy rice zucchini casserole

1. Step 1: Cook whole zucchini in salted, boiling water until just tender; chop when cooled; drain. Add to bowl with green onions, parsley, and rosemary; mix.

2. Step 2: Add cooked rice and shredded cheese; gently blend.

3. Step 3: Drizzle on olive oil; add slightly beaten egg; stir to combine.

4. Step 4: Spread into prepared casserole dish and bake.

For complete step-by-step instructions, see the printable recipe card below.

Hint: To get this cheesy zucchini casserole on the table even faster, we use a pouch of pre-cooked microwavable rice. It cuts down on prep time and ensures the rice has the perfect firm texture to soak up all that delicious melted cheddar!

🌿Healthy ingredient substitutions

• Swap White Rice for Brown Rice or Quinoa - For a boost of fiber and protein, use cooked brown rice or quinoa. This makes the casserole even more substantial as a meatless main dish and adds a nice nutty flavor that pairs perfectly with the rosemary.
• Use Egg Whites or a Flax Egg - If you want to lower the cholesterol, you can swap the whole egg for two egg whites. For a plant-based binding option, a "flax egg" (ground flaxseed mixed with water) adds healthy omega-3 fatty acids while keeping the casserole firm.
• Opt for Reduced-Fat Extra Sharp Cheddar - To lower the calorie and fat content without losing that signature "cheesy" impact, swap in a reduced-fat sharp cheddar. Because it still melts beautifully, you’ll keep the comforting texture of the cheesy zucchini casserole while making it a bit lighter for a healthy weeknight meal.

📖Creative cheesy zucchini casserole variations

• Cheesy Rice Squash Casserole - Swap the zucchini for yellow summer squash for a colorful twist. This version has a slightly sweeter profile that tastes incredible when served alongside baked ham.
• Chicken and Zucchini Main Meal - To turn this into a protein-packed dinner, stir in 1–2 cups of precooked shredded chicken before baking. This simple addition makes the casserole a complete, kid-friendly meal that's perfect for busy weeknights.
• Crispy Bacon Topping - For a savory crunch, sprinkle chopped, crisp bacon over the top of cheesy zucchini casserole just before serving. The salty bacon perfectly complements the melted cheddar and tender rice.

🍽Essential equipment needed

• large pot with lid (for the zucchini)
• 13x9 casserole dish, sprayed with cooking spray
• cutting board
• santoku or chef's knife
• colander
• large mixing bowl
• measuring cups & spoons

🍶How to store and reheat cheesy zucchini casserole

To maintain the best flavor and texture, store any leftover cheesy zucchini casserole in an airtight container in the refrigerator. When stored properly, this hearty bake will stay fresh and delicious for up to 5 days, making it a fantastic option for meal prep.

• Freezing Instructions: You can also freeze leftovers in a freezer-safe bag or container for up to 3 months. For the best results, let the casserole defrost overnight in the fridge before reheating.
• How to Reheat: To keep the cheese melty and the rice tender, cover the dish with aluminum foil and bake at 325°F for 20-25 minutes, or until heated through. You can also microwave individual portions in 30-second intervals for a quick lunch.

❓Cheesy zucchini and rice casserole FAQ

🥒More easy zucchini recipes

Here are some other favorite zucchini recipes:

🍴Pairing suggestions for holiday meals

These are my favorite dishes to serve on holidays with Cheesy Rice Zucchini Casserole:

📋Recipe with step-by-step instructions

Best Cheesy Zucchini Casserole with Rice

Kitchen Ready Betty

This hearty cheesy zucchini casserole is a satisfying meatless main or side dish packed with fresh garden zucchini, fluffy rice, and melted extra sharp cheddar. Infused with aromatic rosemary and green onions, it's an easy weeknight meal that pairs perfectly with your favorite proteins or stands alone as a comfort food favorite.

5 from 2 votes

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr

Course Main Dishes, Side Dish

Servings 8

Calories 332 kcal

Equipment

• large pot with lid (for zucchini)
• 13x9 casserole dish (lightly greased)
• cutting board
• chef's knife
• colander
• large mixing bowl
• measuring cups
• measuring spoons
• sturdy mixing spoon

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Ingredients

  

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• 2 pounds (about 3 medium) zucchini
• salt
• ½ cup green onion chopped
• 1.5 tablespoons dried parsley or ⅓ cup fresh, chopped
• ¼ teaspoon dried rosemary
• 1 pouch (8.8 oz) microwavable rice makes approximately 1.5 cups cooked rice
• 8 oz (2 cups) shredded extra sharp cheddar cheese
• ¼ cup extra virgin olive oil
• 1 egg slightly beaten

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Instructions

 

• Preheat oven to 350 degrees.
• Cook whole zucchini in salted, boiling water until just tender. This usually takes about 10 minutes (check with a fork periodically).
• Microwave rice while zucchini is cooking.
• Once zucchini is tender, drain in colander, salt, and let cool. Use paper towels to squeeze out excess moisture. Then chop cooled zucchini into bite-sized pieces.
• Place the diced zucchini in a large bowl. Add green onions, parsley, and rosemary; stir to combine.
• Next, add the cooked rice and shredded cheese. Gently mix.
• Add olive oil and add slightly beaten egg. Stir to combine.
• Place mixture in a lightly greased 13x9 glass baking dish. Bake uncovered in a 350 degree preheated oven for 45-50 minutes, or until casserole is slightly brown around the edges and center is somewhat firm.

Notes

Once the zucchini is chopped, generously salt it and let it sit in a colander to drain for at least 10 minutes. Then absorb excess water with paper towels before adding it to the dish. You don't want to add overly moist zucchini to the casserole because it will make the consistency too mushy.

Refrigerate leftovers, store in an airtight container and enjoy within 5 days.

See above post for freezing and rehaeting instructions.

Nutrition

Calories: 332kcalCarbohydrates: 33gProtein: 11gFat: 18gSaturated Fat: 7gPolyunsaturated Fat: 1gMonounsaturated Fat: 7gTrans Fat: 0.003gCholesterol: 49mgSodium: 207mgPotassium: 393mgFiber: 2gSugar: 3gVitamin A: 610IUVitamin C: 22mgCalcium: 240mgIron: 1mg

Keyword casserole, cheese, cheesy rice zucchini casserole, cheesy zucchini casserole, family meals, holiday, rice, side dish, summer, zucchini, zucchini casserole, zucchini rice casserole

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_{Please note that nutritional information is provided by a third party service and is intended for guidance purposes only. KitchenReadyBetty.com makes no claims to its accuracy.}