Mediterranean Spring Rolls  - Puff Pastry

Ingredients

• 1 tablespoon olive oil
• 1 large onion, minced (about 1 cup)
• 1 can (about 14 ounces) artichoke hearts, drained and chopped
• 1/2 cup minced sun-dried tomatoes
• 1/2 teaspoon black pepper
• 2 teaspoons minced fresh parsley
• 1/2 of a 17.3-ounce package Pepperidge Farm® Puff Pastry Sheets(1 sheet), thawed
• 2 tablespoons prepared basil pesto
• 1 egg, beaten
• 1 teaspoon balsamic vinegar