Chicken Florentine Panini

Name: Chicken Florentine Panini
Ingredients: 1 (10-oz.) can Pillsbury® Refrigerated Pizza Crust; 1 (9-oz.) pkg. Green Giant Frozen Spinach; 1/4 cup light mayonnaise; 1 garlic clove, minced; 1 tablespoon olive oil; 1 cup chopped red onion; 1 tablespoon sugar; 1 tablespoon vinegar (cider, red wine or balsamic); 2 boneless skinless chicken breast halves; 1/2 teaspoon dried Italian seasoning; 4 (4-inch) slices provolone cheese