Sunday Dinner Creamy BBQ Chicken

4-6 chicken breasts
1 15 oz can tomato sauce
1/2 cup honey
4 Tbls pure maple syrup
1/2 cup vinegar
1/2 cup + 3 Tbls soy sauce
2 tsp mustard
2 tsp liquid smoke
1 cup plain greek yogurt
1/2 onion, sliced
3 cloves garlic, minced
4 Tbls cornstarch + a little water for thickening (optional)

In a bowl, combine tomato sauce, honey, maple syrup, vinegar, soy sauce, mustard, liquid smoke and greek yogurt. Stir until combined. Add in sliced onion and garlic. Pour over chicken breasts in a 9x13 casserole dish. Cover with tin foil and cook for 1 1/2 hours on 350 degrees.  If you want, place some sweet potatoes or baking potatoes around the casserole dish and they will cook right along with your BBQ Chicken. When it's done, transfer chicken to a plate and cover with foil. Pour sauce into a pot and bring to a boil. Add in some of the cornstarch mixed with water and stir until it's reached your desired consistency of gravy. You may or may not add all of the cornstarch/water. Enjoy!