Creating an amazing Cheesy Ham and Pea Casserole is easier than you might think. Follow these step-by-step instructions:

1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C). This will ensure the casserole cooks evenly.

2. Prepare the Pasta: Cook the pasta according to package instructions until al dente. Drain and set aside.

3. Mix Ingredients: In a large mixing bowl, combine the diced ham, thawed peas, cooked pasta, cream of mushroom soup, milk, garlic powder, onion powder, and dried thyme (if using). Mix until everything is well incorporated.

4. Add Cheese: Stir in the shredded cheddar and mozzarella cheese, reserving a small portion of each for topping the dish.

5. Season: Add salt and pepper to taste, adjusting according to your preference.

6. Transfer to Casserole Dish: Pour the mixture into a greased 9×13-inch casserole dish, spreading it evenly.

7. Top with Cheese: Sprinkle the reserved cheese on top of the casserole for an extra cheesy finish.

8. Add Bread Crumbs (Optional): If you like a crunchy topping, mix the bread crumbs with melted butter and sprinkle it over the cheese layer.

9. Bake the Casserole: Place the casserole in the preheated oven and bake for 30-35 minutes or until the cheese is bubbly and golden brown.

10. Serve: Once cooked, remove from the oven and let it rest for a few minutes before serving for easier serving.

Following these steps will yield a delicious Cheesy Ham and Pea Casserole that will make your taste buds dance!