Pantry Chicken Casserole

1 . Stage

Preheat the oven to 350 degrees F (175 degrees C). Spray a large casserole dish with cooking spray.

2 . Stage

Bring a large pot of lightly salted water to a boil. Add penne and cook, stirring occasionally, until tender yet firm to the bite, about 11 minutes. Drain.

3 . Stage

While pasta is cooking, melt butter in a large skillet over medium heat. Add onion and bell pepper; cook, stirring occasionally, until vegetables are tender, about 5 minutes. Add mushrooms and cook until their liquid is released, about 5 minutes. Add garlic and cook, stirring occasionally, until fragrant, about 1 minute.

4 . Stage

Stir in processed cheese food, diced tomatoes with juice, diced tomatoes and green chiles with juice, and mild chile peppers. Cook and stir until cheese has melted, 5 to 10 minutes. Remove from heat and stir in cooked pasta and chicken. Pour into the prepared baking dish.

5 . Stage

Bake in the preheated oven until heated through, about 20 minutes. Serve warm.