Tomazin's Sloppy Joes

This is a recipe from my mother in law's family. Much better than those seasoning packets in the store and uses ingredients you usually have in your cupboards.

2 lbs ground hamburger or meat
1 medium onion
1/2 green pepper (I usually throw in the whole thing. I like peppers!)

Brown meat, onion, and green pepper together. Add sauce and let simmer for a while or throw in a crockpot and eat it later.

Sauce:
1 TBSP mustard
1 cup ketchup
2 TBSP vinegar
1 TBSP sugar (I usually omit this and no one notices)
1/4 cup water
1/2 tsp salt
pepper to taste
1/8 tsp paprika

The longer this cooks, the better. This can be frozen.
Serve on rolls or buns.