In a large frying pan, brown ground beef until just beginning to brown.
Add onion, red pepper, salt and chili powder. Mix thoroughly and cook until done and veggies are tender.
Add tomato paste, vinegar, mustard, and optional sweetener to the browned ground beef. Stir thoroughly together and simmer for a few minutes for the flavors to release. If a little dry add a small amount of water or broth.
Taste and adjust seasonings as desired. Serve on top of warmed or toasted Awesome Bunz and enjoy!