Dice the onion and green pepper-set aside. Combine the ground beef, onion, green pepper, Heinz 57 sauce, and breadcrumbs into a large bowl and mix with your hands messy, but it’s easier to incorporate your ingredients by hand.
Place in a greased baking dish of your choice (we used our Pie Plate) and put into the oven for 1 hour. Remove the baking dish from the oven, baste the top of the meatloaf with ketchup, and place it back into the oven for 15 to 20 minutes.
Slice and enjoy! Serve up with some potatoes(mashed or baked) and, if you like, some steamed veggies like broccoli, cauliflower, and carrots for a delicious, wholesome meal.