Start by preheating your oven to 400°F. Spray a 9” x 13” baking dish with cooking spray to prevent sticking.
Set up two shallow bowls: one with egg substitute and the other with half the cheddar, Panko, garlic powder, onion powder, parsley, salt, and pepper. Dip chicken into egg, then coat in the breadcrumb mixture.
Place coated chicken in the prepared baking dish. Cover with foil and bake for 30 minutes. Remove foil and bake another 8-10 minutes until edges are crisp and golden.
While chicken bakes, warm Cream of Chicken soup in a saucepan. Stir in sour cream and remaining cheddar until smooth. Thin with a tablespoon of water or broth if too thick.
Pour sauce over the baked chicken and garnish with fresh parsley. Serve immediately for the best texture and flavor.