Set Crockpot on High then dice Onion and add to Crockpot. Next add Lean Hamburger, Salt, Pepper and Garlic Salt then combine well. Add Barbecue Sauce and stir. Add Pork and Beans and mix lightly to combine. Cook approx 1 1/2 hours or until Hamburger is thoroughly cooked. Stir then add Biscuits in a single layer to cover top. For faster cooking, leave center open and only place biscuits around outer edge. Cover and cook approx another 1 1/2 hours or until Biscuits are done.