Cheesy Chicken and Vegetable Casserole: A Cozy and Delicious One-Pan Meal

Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish or casserole dish.
Sauté the Vegetables:

Heat the olive oil in a large skillet over medium heat. Add the diced bell peppers and sauté for about 3-4 minutes until softened. If using fresh broccoli, blanch the florets in boiling water for 2 minutes, then drain and set aside.
Make the Casserole Sauce:

In a large bowl, combine the cream of chicken soup, milk, garlic powder, onion powder, salt, and black pepper. Mix until smooth.
Assemble the Casserole:

Add the shredded or diced cooked chicken, sautéed bell peppers, broccoli, and cooked rice or pasta (if using) to the sauce. Stir in the cheddar cheese and mozzarella cheese, mixing everything together.
Bake the Casserole:

Transfer the mixture into the prepared baking dish. Sprinkle the top with grated Parmesan cheese, if desired, for added flavor and a golden finish.
Bake uncovered for 25-30 minutes, or until the casserole is bubbly and the top is lightly golden.
Serve:

Remove the casserole from the oven and let it cool for a few minutes before serving. Enjoy it as a complete meal or pair it with a side salad or garlic bread.
Serving and Storage Tips: