Mix turkey, oatmeal, milk and egg in a bowl, using hands to ensure thorough mixing.
Stir in remaining ingredients; onions, mushrooms, garlic and spices.
Spray a loaf pan with nonstick cooking spray. Form into a loaf and cover with foil.
Bake covered for 40-45 minutes, uncover and cook an additinal 10 minutes.
NOTES: Depending on what kind of side dishes I plan to have, I sometimes add a tomato topping during the last 10 minutes of baking, or I make mushroom gravy to serve over top. Leftovers make great open faced sandwiches!