Preheat oven to 350F. Spray a 9X5" loaf pan with cooking spray.
Mix together ground beef, onion, eggs, pepper, Worcestershire sauce, garlic salt, onion salt and toamto sauce in a large bowl. Using your hands. Do not over mix.
In a small bowl, combine ketchup sugar and mustard. Spread on top of meatloaf and place in oven. Bake for 1 hour and 15-30 minutes, or until meatloaf is cooked through. Let cool for a few minutes and then slice and serve. Enjoy!