Sweet and Sour ham (great for leftover ham)

Lightly brown 2 and 1/2 cups diced ham and 1/3 cup chopped green pepper in 2 TBS oil. Mix 1 and 1/2 TBS cornstarch 3/4 cup water, 1/2 cup pineapple juice, 1 and 1/2 TBS vinegar, 2 TBS brown sugar,, 1 and 1/2 TBS prepared mustard, and dash of pepper. Add to ham, cook and stir until transparent. Add 1/2 cup pinepapple tidbits. Serve over rice. Easy and delicious.