4 crusty Italian hero rolls, (about 3 ounces each), split in half horizontally, insides torn out to form a hollow
6 ounces thinly sliced (about 10 slices) pepper Jack cheese
Directions
Preheat broiler with rack 6 inches from heat. In a large skillet, heat oil over medium-high. Add onion and peppers; cook, stirring often, until softened and beginning to char, 10 minutes. Season with salt and pepper. Remove from heat; stir in vinegar and steak.
Place bottom halves of rolls on a large rimmed baking sheet; dividing evenly, top each with meat mixture, then cheese slices. Broil until cheese has melted, about 2 minutes. Remove from oven; transfer to a cutting board.
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