Yields: 12
Prep.Time: 30 minutes
1 large vidalia onion, halved -- sliced 1/4" thick
1 tablespoon olive oil
1 teaspoon balsamic vinegar
1/2 cup mayonnaise
2 tablespoons finely chopped fresh cilantro leaves
1/4 cup freshly grated Parmesan cheese
6 English muffins -- halved
In a medium skillet, saute onions in butter over medium-low heat until nicely browned and carmelized, stirring occasionally, about 20 minutes. Stir in balsamic vinegar; mix well. Transfer onions to a medium bowl; add mayonnaise, cilantro and cheese; mix until well-combined. (Can be prepared ahead and chilled 1-2 hours; bring to room temperature before using.)
Preheat broiler; place muffin halves on a shallow baking pan and broil 1-2 minutes until lightly browned. Spoon onion mixture on tiop of muffin halves; return to broiler 1-2 minutes or until tops are lightly browned and oozing. Serve immediately.