Heat the oven to 350°. Grease an 8 1/2 x 4 1/2-inch loaf pan or line with foil and lightly grease.
In a large bowl, combine ground beef with the crushed saltines, onion, green pepper, egg, paprika, garlic salt, thyme, black pepper, 1/3 cup ketchup, milk, and Worcestershire sauce.
Pack the meat mixture into the loaf pan and bake for 1 hour. Carefully pour off excess grease.
Spread with the 3/4 cup ketchup or barbecue sauce and continue baking for 15 minutes longer, or until the meatloaf registers at least 160° on an instant read food thermometer inserted into the center.
