Cheesy Oven-Baked Chicken and Zucchini Skillet Casserole

A creamy, cheesy comfort dish that turns simple ingredients into a hearty family dinner. Tender shredded chicken and fresh zucchini are baked in a rich, savory cheese sauce until bubbly and golden on top.

📝 Ingredients

3 cups cooked rotisserie chicken, shredded
3 medium zucchinis, sliced into thin rounds
1 tablespoon olive oil
1 small onion, finely chopped
2 cloves garlic, minced
1 cup sour cream or Greek yogurt
1/2 cup mayonnaise
1 cup shredded mozzarella cheese
1/2 cup grated Parmesan cheese
1 teaspoon Italian seasoning
1/2 teaspoon paprika
1/2 teaspoon salt
1/4 teaspoon black pepper

👩‍🍳 Instructions

1️⃣ Prepare the Oven

Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish or an oven-safe skillet to prevent sticking.

2️⃣ Sauté the Vegetables

Heat the olive oil in a skillet over medium heat. Add the chopped onion and cook for about 3–4 minutes until soft and translucent. Stir in the minced garlic and cook for another 30 seconds until fragrant.

3️⃣ Cook the Zucchini

Add the sliced zucchini to the skillet and sauté for 4–5 minutes, stirring occasionally. Cook until the zucchini begins to soften but still holds its shape. Remove from heat.

4️⃣ Make the Creamy Sauce

In a large mixing bowl, combine the sour cream (or Greek yogurt), mayonnaise, mozzarella cheese, Parmesan cheese, Italian seasoning, paprika, salt, and black pepper. Mix well until the sauce is smooth and evenly blended.

5️⃣ Combine the Filling

Add the shredded rotisserie chicken and the sautéed zucchini mixture to the bowl with the creamy sauce. Stir gently until everything is well coated.

6️⃣ Assemble the Casserole

Transfer the mixture into the prepared baking dish or skillet. Spread it evenly to ensure even cooking. If desired, sprinkle a little extra mozzarella or Parmesan cheese over the top for a golden cheesy crust.

7️⃣ Bake the Casserole

Place the dish in the preheated oven and bake for 25–30 minutes, or until the casserole is hot and bubbly and the top is lightly golden.

8️⃣ Rest and Serve

Remove from the oven and let the casserole rest for about 5 minutes before serving. This allows the sauce to thicken slightly and makes it easier to portion.

🍽️ Serving Suggestions

Serve this casserole with:
Fresh green salad
Garlic bread
Steamed rice or roasted potatoes

📊 Nutritional Information (Approximate per serving)

Calories: ~520
Protein: ~38 g
Carbohydrates: ~9 g
Fat: ~36 g
Fiber: ~2 g

This cheesy chicken and zucchini casserole is a quick, satisfying dinner that’s perfect for busy weeknights while still feeling rich and comforting.

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