Step 1

Preheat oven to 375°F. Line a rimmed baking sheet with aluminum foil or spray a 9x13-inch baking dish with nonstick cooking spray, set aside.

Step 2

Combine ground beef, soy sauce, salt, pepper, egg, tomatoes, and oats and mix to combine, but be cautious about overmixing.

Step 3

Transfer the mixture to the prepared pan or dish (Yep, no loaf pan here!) and form into a loaf in the center of the dish.

Step 4

Mix ketchup, mustard and brown sugar together for topping.

Step 5

Spread topping over loaf.

Step 6

Bake for 45 mins to 1 hour or until cooked through. The center should read 160°F when using an instant read thermometer. Allow to rest for about 10 minutes then slice and serve.