Heat oven to 350°F. In large bowl, combine all ingredients, mixing lightly but thoroughly. Press into 8 x 4-inch loaf pan. Bake 1 hour to medium doneness (160°F internal temperature). Meatloaf should not be pink in center and the juices should show no pink color. Let stand 5 minutes; drain off any juices before slicing.
Serving Tips: Customize meatloaf by adding one of the following to meatloaf ingredients: 1) 1/2 cup frozen (thawed) or canned (drained) corn; 2) 1/2 cup chopped green or red bell pepper; 3) One 2-1/2-ounce jar sliced mushrooms, drained; 4) 1/3 cup grated Parmesan cheese; or 5) Two tablespoons finely chopped fresh parsley or cilantro. Sprinkle top of baked meatloaf with 1 cup shredded cheese. Return to oven for 3 minutes to melt cheese. Spoon heated prepared spaghetti sauce, pizza sauce, barbecue sauce or salsa over meatloaf before serving.
source: https://www.quakeroats.com/cooking-and-recipe/prize-winning-meatloaf.aspx