Jack Lemmon's Barbecue Sauce *

• 1 clove garlic
• 1 bay leaf
• 1/2 onion
• 700 ml catsup
• 240 gr maple syrup
• 230 gr butter
• 60 ml lemon juice
• 60 gr sharp salad dressing
• 16 ml worcesteshire sauce
• 5 ml english mustard