Here are three recipes for some yummy bbq sauces.

#1
1 small onion finely chopped
1/2 tsp. salt
1/2 tsp. celery seed
1/8 tsp cinnamon, ground
1/8 cup cider vinegar
1/4 cup sugar free ketchup
1 tbsp. mustard
1/4 tsp. nutmeg, ground
1/4 tsp. splenda
1/2 cup water
1/2 to 1 tsp hot sauce, to taste

Combine all ingredients in a medium sauce pan and cookk until just boiling. Then simmer for 5 min.

#2
3 tbsp. extra virgin olive oil
1 small onion, chopped fine
2 cloves garlic, chopped fine
1/2 tsp. cayenne pepper, or less depending on how hot you like it
1 tsp. ground ginger
1 tsp. dry mustard
1 tsp. salt
1/4 tsp allspice
1 15 oz. can tomato puree, sugar free
2 tbsp. splenda
1/4 cup vinegar
1/4 tsp. black pepper

Heat the oil in a saucepan over medium heat. Add onion and garlic, cook til soft. Add cayenne, ginger, mustard, salt, and allspice, cook for a couple of minutes.
Add the remaining ingredients. Bring to a boil. Reduce heat to low and simmer, stirring often until slightly thickened, about 15 min.

#3
1 large onion, sliced thinly
4 cloves garlic, crushed
1 tsp. salt
1/2 tsp. crushed red pepper flakes
1/2 tsp black pepper
1 tsp. paprika
1 tsp. chili powder
2 tbsp. worchestershire sauce
2 tbsp. vinegar
1 tsp. liquid smoke, hickory if possible
3/4 cup sugar free ketchup
3/4 cup water

Combine all ingredients in a saucepan, heat, stirring frequently until thick, about 15 min.