The hubs likes it with ketchup. I personally think anything dipped in ketchup is vile. I like mustard on mine. I won't hold a thing against the ketchup lovers if the mustard haters don't hold my mustard loving against me. We can all still be friends. :)
1 envelope dry onion soup mix (like Lipton Recipe Secrets)
2 pounds ground beef (I sometimes use turkey)
3/4 cup oatmeal
3/4 cup water
1/3 cup ketchup (not vile in things, just on things)
Preheat oven to 350. Combine all ingredients in a large bowl and mix until well combined (I usually just mix it with my hands. Washed, of course. The kids like to help too.). Shape into a loaf on a baking sheet lined with foil (for easier clean up :)). Bake uncovered for 1 hour.
Recipe adapted from Lipton.