Barbecue Sauce For Fish

Ingredients

• 1 x Thick lemon slice
• 1 x Onion, sliced
• 1/4 c. White vinegar
• 1 1/2 tsp Salt
• 1 Tbsp. Prepared mustard
• 1/4 tsp Pepper
• 2 Tbsp. Sugar
• 1/4 tsp Cayenne (red) pepper
• 2 Tbsp. Butter
• 1/2 c. Catsup
• 2 Tbsp. Worcestershire sauce
• 1 tsp Liquid smoke