A slow cooker beef stew makes a delicious meal for any day of the week. This version includes plenty of beef along with mushrooms, tomatoes, seasonings, and barbecue sauce for flavor. Feel free to adjust the seasonings to suit your family's tastes. For extra flavor, color, and nutrients, add frozen thawed peas, corn, or green beans about 30 minutes before the stew is ready. Sirloin tips are an excellent option for the stew as well. Serve this beef stew over hot boiled rice, mashed potatoes, polenta, or pasta. Add a salad for a complete, satisfying meal.