Garlic Parmesan Chicken Zucchini Casserole

FAMILY BAKES · LOWER CARB

Tender zucchini and bite-size chicken bake in a garlicky cottage cheese and Parmesan layer under melted mozzarella. It is a lower-carb casserole that still feels like comfort food, and a good way to use a few zucchini from the garden or a sale.

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Chicken zucchini casserole with golden mozzarella and Parmesan, and a serving with zucchini slices on a plate.
Serves
6
Baking dish
9×13 inches
Bake
25–30 minutes
Oven
400°F / 200°C
Chicken done at
165°F / 74°C

Why You’ll Love This Casserole

  • Lower in carbs. Zucchini replaces pasta or rice.
  • Not watery. Salting and drying the zucchini first keeps the sauce creamy.
  • Familiar garlic Parmesan flavor. Easy to like, even for picky eaters.

Ingredient Notes

Zucchini is mostly water. Salt the slices and let them drain for 15 minutes, then pat them dry. This one step is the difference between a creamy casserole and a soupy one.

One egg blended with the cottage cheese helps the creamy layer set around the vegetables.

Use grated Parmesan in the sauce for flavor and shredded mozzarella on top for the melt.

The recipe card below lists every quantity in one place.

How to Make Garlic Parmesan Chicken Zucchini Casserole

Drain the zucchini and blend the sauce

Salt the sliced zucchini and let it drain, then pat it dry. Blend the cottage cheese with the egg, Parmesan, garlic and seasoning.

Raw chicken pieces, sliced zucchini, cottage cheese, an egg, Parmesan, shredded mozzarella and garlic on a counter.
1. Gather the chicken, zucchini, cheeses and garlic.
Salted zucchini half-moons draining in a colander over a bowl.
2. Salt and drain the zucchini.

Layer and bake

Mix the seasoned chicken with the zucchini in the dish, spread the sauce over it and top with mozzarella. Bake until the chicken reaches 165°F.

Chicken pieces and zucchini in a 9×13 dish covered with the creamy Parmesan sauce.
3. Spread the sauce over the chicken and zucchini.
Unbaked chicken zucchini casserole covered with shredded mozzarella in a 9×13 dish.
4. Top with mozzarella and bake.

Photos in this article are AI-generated illustrations of the recipe, created for AllRecipeEasy.

Tips and Troubleshooting

  • Slice evenly. Cut the zucchini into ¼-inch half-moons so they cook at the same pace as the chicken.
  • Rest before serving. A 5–10 minute rest lets the sauce thicken.
  • Add color. Stir in a handful of halved cherry tomatoes or chopped spinach for variety.

Substitutions

  • Yellow squash: Replace half or all of the zucchini with yellow summer squash.
  • No egg: Leave out the egg; the sauce will be looser but still good.
  • Italian sausage: Swap the chicken for browned and drained Italian chicken sausage.

Serving Suggestions

Serve with crusty bread, a green salad or a little pasta. For another Parmesan chicken dinner, try the garlic Parmesan chicken meatloaf. For a tomato-basil version of this bake, see the caprese chicken cottage cheese bake.

Storage and Reheating

Refrigerate the leftovers within 2 hours, covered, for up to 4 days. Reheat until hot in the center (165°F). Freezing is not recommended, because zucchini turns soft and watery when thawed.

Food safety: Cook the chicken to 165°F / 74°C. The egg in the sauce is fully cooked when the casserole is bubbling and the chicken is done.

Chicken zucchini casserole with golden mozzarella and Parmesan, and a serving with zucchini slices on a plate.
AllRecipeEasy Kitchen

Garlic Parmesan Chicken Zucchini Casserole

Chicken zucchini casserole with garlic, Parmesan, mozzarella and a creamy cottage cheese layer. Lower-carb, high-protein and baked in one 9×13 dish for six.
Prep Time 25 minutes
Cook Time 30 minutes
Rest 5 minutes
Total Time 1 hour
Servings: 6 servings
Course: Main Course
Cuisine: Italian-American
Calories: 310

Ingredients
  

  • 2 medium zucchini about 1 lb, sliced into ¼-inch half-moons
  • 1 tsp salt for draining the zucchini
  • 1½ lb boneless, skinless chicken breasts cut into 1-inch pieces
  • 1 tbsp olive oil
  • 1 tsp Italian seasoning
  • ½ tsp garlic powder
  • ¼ tsp black pepper
  • 1½ cups low-fat (2%) cottage cheese
  • 1 large egg
  • ½ cup grated Parmesan
  • 3 cloves garlic minced
  • 1 cup shredded part-skim mozzarella

Method
 

  1. Toss the zucchini with the salt in a colander and let it drain for 15 minutes. Pat it very dry with paper towels.
  2. Heat the oven to 400°F / 200°C and lightly grease a 9×13-inch baking dish.
  3. Toss the chicken with the olive oil, Italian seasoning, garlic powder and pepper. Combine it with the zucchini in the dish.
  4. Blend the cottage cheese, egg, Parmesan and minced garlic until smooth. Spread it over the chicken and zucchini.
  5. Sprinkle with the mozzarella. Bake uncovered for 25–30 minutes, until bubbling and the thickest piece of chicken reads 165°F / 74°C.
  6. Rest for 5–10 minutes before serving.

Notes

Nutrition per serving is an estimate (about 310 kcal and 40 g protein). It is calculated from USDA FoodData Central values for the listed non-optional ingredients and divided by 6 servings. Brands vary.
Contains: milk, eggs. Check labels on packaged ingredients such as seasoning mixes and sauces if you cook for allergies.