Oriental Steak Rolls

1 pound flank steak
Salt and Pepper
16 asparagus spears, trimmed
16 thin green onions, trimmed
1 green pepper, cut in strips
16 mushrooms (any variety), sliced
1 carrot, julienned or thinly sliced
1/3 cup seasoned rice vinegar
1/3 cup soy sauce
3 teaspoons sugar
1 tablespoon sesame oil
1/2 tablespoon cornstarch

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