Meat Loaf

1 pound ground beef
1 1/4 teaspoons salt
1/4 teaspoon ground black pepper
1/2 cup chopped onion
1/2 cup chopped bell pepper
1 egg, lightly beaten
1 (8 ounces) can diced tomatoes with juice
1/2 cup quick-cooking oats

Topping:
1/3 cup ketchup
2 Tablespoons brown sugar
1 Tablespoon prepared mustard

Preheat oven to 375 degrees.
Mix all meatloaf ingredients well and place in a baking dish. Shape into a loaf.

Topping:
Mix ingredients for topping and spread on loaf. Bake for 1 hour.