
Prep time: 10 minutes
Cook time: 15 minutes
1 pound ground beef
1 tablespoon Worcestershire sauce
1/2 teaspoon salt
1/4 teaspoon black pepper
1 small onion, peeled and cut into 6 (1/2-inch) rounds
1 teaspoon olive oil
6 (1 1/2-ounce) slices California smoked gouda
6 (3-inch) round rolls, split and toasted