Step 3
In a medium saucepan over medium heat, mix the picante sauce, brown sugar, barbeque sauce, garlic, mustard, Worcestershire sauce, jalapeno peppers, and onion. Season with salt and pepper. Bring to a boil, reduce heat to low, and simmer 30 minutes, stirring occasionally, until thickened. Pour over the ribs in the plastic bags. Seal bags, and marinate ribs 8 hours, or overnight, in the refrigerator.