Chicken Finger & Mashed Potato TV Dinner

Name: Chicken Finger & Mashed Potato TV Dinner
Prep time: 25 min
Cook time: 1 h
Total time: 1 h 25 min
Cuisine: American
Ingredients: 1/4 cup all-purpose flour; 1 egg; 1 tablespoon water; 1 cup breadcrumbs; 1/2 cup Parmesan cheese, grated; 1 pound chicken breast tenders; 2 pounds russet potatoes; 1 cup milk; 4 tablespoons butter; 2 teaspoons kosher salt; 1 teaspoon black pepper; 2 tablespoons butter; 1 white onion, small dice; 1 large carrot, small dice; 2 cups frozen peas