Preheat oven to 350°F (175°C).
Spread cooked egg noodles evenly in a 9x13-inch baking dish.
In a skillet over medium-high heat, cook chicken with minced onion for 7–10 minutes until fully cooked.
Add cream of chicken soup, milk, and peas and carrots. Stir well.
Season with salt, pepper, paprika, and chili powder. Cook until the mixture begins to bubble.
Combine the chicken mixture with noodles in the baking dish.
Top with Monterey Jack cheese slices and cubed bread.
Bake for 30 minutes until golden and crispy on top.
Serve hot and enjoy your Cheap Chicken Noodle Casserole.