1 sm. onion, finely chopped
2 tbsp. olive oil
1/4 c. vinegar
1 c. water
2 tbsp. prepared mustard
1 1/4 c. tomato puree
1 tsp. brown sugar
1 tbsp. Worcestershire sauce
1/2 tsp. chili powder
Pinch of garlic

Saute onion in olive oil until golden brown. Combine remaining ingredients and add to cooked onion. Simmer 1 hour, stirring occasionally. Add 1/2 teaspoon Tabasco sauce 15 minutes before serving.