Balsamic Onion Stacks

8 (1/2 inch thick) sweet onion slices (or red onion)
1/3 c balsamic vinegar
1/4 c olive oil
1 1/2 tsp paprika
1 tsp salt
1/2 tsp ground black pepper
1 (8-ounce) pkg fresh mozzarella, cut into 4 (1/2 inch thick) rounds
fresh basil leaves
4 (1/2 inch thick) fresh tomato slices
basil sprigs for garnish

Arrange onion slices in a single layer in a large baking dish. Stir together vinegar and next 4 ingredients. Pour over onion slices and let marinate for a few hours. Remove onions from dressing, reserving dressing. Grill onion slices, covered with grill lid over medium-high heat 2-3 minutes per side. Layer half of grilled onion slices each with 1 cheese round, basil and 1 tomato slice; top with remaining half of onion slices. Grill onion stacks, covered with grill lid, over medium-high heat 3 minutes or until cheese melts. Serve onion stacks with reserved dressing. Garnish with more basil.

Yield: 4 servings