Dani, I went hunting for a basting sauce and came up with something that sounds promising:
Smokey's Scratch Basting Sauce
1 medium onion, choped
2 garlic cloves, crushed
2 medium carrots, cut into chunks
2 stalks celery with leaves, coarsely chopped
2 bay leaves
1 heaping teaspoon crushed thyme
1 lemon, juiced and whole lemon included
1 heaping tablespoon non-iodized salt
1 heaping tablespoon freshly ground black pepper
1 quart water
Simmer the above ingredients in a stainless pot for 30 minutes. Add:
1/2 pound unsalted butter
1 pint apple cider vinegar
Strain sauce. Baste meat and let dry and baste again before placing on grill. Baste at 10 to 15 minute intervals while cooking.
From: "The Great American Barbeque Instruction Book" via