Brown hamburger and drain the grease. Set aside on low heat. Saute onion, green pepper, and celery in vegetable oil till soft. Mix into hamburger. Add seasoning salt, flour, Spicy All Purpose Sauce, and BBQ Sauce to hamburger mixture. Bring mixture to a boil Let simmer for 15 minutes to blend flavors. Put BBQ mixture into submarine rolls and sprinkle each sub sandwich with 1 T. Colby cheese. Serve immediately.