Place frozen cherries in colander. Run cold water over cherries to partially thaw. Set aside; drain well.
In a 12-inch skillet cook mushrooms, sweet pepper, onion, and 1 tablespoon of the herb in hot oil until tender, about 7 minutes. Add pot roasts and juices, cherries, and balsamic vinegar to skillet. Bring to boiling; reduce heat. Simmer, uncovered, for 10 minutes or until heated through and juices thicken slightly, stirring occasionally. Sprinkle with remaining herb; stir to combine. Makes 4 to 6 servings.