In this task, you will be presented with the directions of a recipe separated by "," and have to fill in the "___" which is a step that is missing from the recipe.
Q: Cut tenderloin into 1/4-inch thick slices.,Brown in skillet in 1/2 cup oil.,Sprinkle with Molly McButter and garlic salt. After meat loses red color, add dry mustard and sugar.,Reduce heat and add tomato juice, pepper seed, green pepper and onion. Simmer for about 1 hour, covered.,______,Serve over cooked Uncle Ben's long grain rice.
A:
If necessary, thicken sauce with cornstarch.