(when I made this I doubled the recipe...)
I thought this was okay... I think I prefer my sweet and sour chicken...
1 1/2 pounds boneless chicken, cut in 2-inch chunks
1/2 cup flour
1 tablespoon salt
6 ounces (1/2 can) frozen orange juice concentrate, thawed (I'd opt for little-to-no pulp. The pulp can taste a bit bitter when cooked)
3 tablespoons brown sugar
1 teaspoon vinegar
3 tablespoons ketchup
Dredge the chicken pieces with the flour, and shake off the excess. Heat oil in a large skillet on the stove and brown the chicken on all sides. There is no need to fully cook it, just sear it enough for the flour to stick and get a nice coating.
Plop the chicken pieces into your slow cooker. In a small mixing bowl, combine the orange juice concentrate, brown sugar, balsamic vinegar, salt, and ketchup. Taste. If you'd like the chicken to be a bit sweeter, add a touch more sugar. Pour sauce mixture evenly over the chicken, and toss gingerly to coat.
Cover and cook on low for 6 hours, or on high for 3 to 4. Serve over rice.