Brown ground beef and onion together. Drain meat mixture and put in a crockpot. Add remaining ingredients. Simmer in crockpot until hot throughout. Serve warm.
TIPS
Use your favorite BBQ sauce, I like to use a Honey / Hickory BBQ sauce.
You can also substitute the pinto beans for either navy or great northern beans they will work equally well.
Salt & pepper to taste or for added heat try a little cayenne pepper.