Place peas, onion, water and salt in large saucepan. Cover; bring to a boil. Reduce heat and simmer 30 minutes. Add rice and continue simmering until rice is tender, 20 to 25 minutes. Stir occasionally.
Cook bacon; remove from skillet.
Combine pea mixture, barbecue sauce, half of bacon, pepper and bacon drippings. Place in greased 2-qt. casserole. Top w