Caramelized Onion Tartlets

Another Cooking Light appetizer utilizing two types of onions cooked in white balsamic vinegar and topped with Asiago cheese.

• Ready In: 55 mins
• Serves: 10

Ingredients

• 2  teaspoons olive oil
• 2  small red onions, thinly sliced
• 2  small yellow onions, thinly sliced
• 1  tablespoon  white balsamic vinegar
• 1  sheet frozen puff pastry, thawed
• 1⁄3 cup asiago cheese, shredded
• 1⁄4 teaspoon kosher salt

Directions

1. Heat oil in a skillet over medium-high heat. Add onions; saute 5 minutes. Reduce heat to medium and cook for 15 minutes; stirring occasionally. Add vinegar.
2. Preheat oven to 400 degrees. Unfold dough and place on a work surface lightly dusted with flour. Roll into a 10 x9 inch rectangle. Cut dough into 20 (2 1/4 x 2 inch) rectangles. Score each rectangle about 1/8-inch from edge. Prick dough pieces liberally with a fork. Arrange on a baking sheet lined with parchment paper and chill for 10 minutes.
3. Sprinkle about 3/4 teaspoons cheese over each tartlet; top with about 1 tbsp onion mixture. Sprinkle with salt. Bake at 400 degrees for 15 minutes or until dough is lightly browned.