Texas Barbecue Sauce - cooking recipe

Ingredients

2 medium size onions, finely chopped
1 clove garlic, finely chopped
1/4 c. vegetable oil
2 Tbsp. chili powder
2 c. ketchup
1/2 c. lemon juice
1/4 c. Worcestershire sauce
1/3 c. firmly packed brown sugar
2 Tbsp. prepared mustard
1 Tbsp. celery seed, crushed with a hammer
2 tsp. cumin seed, crushed
2 Tbsp. butter or margarine
1 c. cider vinegar

Preparation

Saute onions and garlic in oil until golden and tender, about 10 minutes.
Stir in chili powder and cook 1 minute.
Add all remaining ingredients except butter.
Bring to a boil.
Lower heat; simmer uncovered, stirring often, for 30 minutes.
Stir in butter.
If any is left over, put in a covered jar.
Can be stored in the refrigerator for months.