Roast Beef Subs with Balsamic Onions and Brie Cheese

By Karen Barris Calabro

4.5 / 5

10min

35min

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1 pound top round beef cut into 1-inch pieces
1 tablespoon Worcestershire sauce
2 teaspoons Montreal steak seasoning
1 tablespoon extra-virgin olive oil
2 small sweet onions sliced
⅓ cup balsamic vinegar
¼ teaspoon salt
¼ teaspoon cracked black pepper
1 teaspoon canola oil
4 (6 inch) submarine sandwich roll split
6 ounces Brie cheese torn into pieces