Spare rib barbecue sauce recipe

Ingredients

• 2 medium
• onions, chopped
• 1 clove(s)
• garlic, minced
• 4 tbsp
• olive oil
• 200 g
• tomatoes, diced, fresh or canned
• 2 tbsp
• dry mustard
• 2 tsp
• sugar
• 1 ½ tbsp
• vinegar
• 100 ml
• tomato paste
• salt and pepper, to taste
• chili peppers, finely chopped