Quick Barbecue Sauce

• 1/4 cup finely chopped onion
• 1 clove garlic, minced or pressed
• 2 tablespoons butter
• 1 cup catsup
• 1/4 cup brown sugar, firmly packed
• 1/4 cup fresh lemon juice
• 1 tablespoon Worcestershire sauce
• 1 teaspoon prepared mustard (your choice: Dijon, German, yellow)
• 1/8 teaspoon Tabasco sauce