Portobello Mushroom & Spinach Burger - Fresh Express

Ingredients

• 1 (7.7-ounce) package Fresh Express® Spinach & Bacon Salad Kit®
• 4 large portobello mushroom caps
• 1/2 cup olive oil
• 1/4 cup balsamic vinegar
• 1 teaspoon dried basil
• 1 teaspoon dried oregano
• 1 tablespoon minced garlic
• 1/4 teaspoon salt
• 1/4 teaspoon pepper
• 4 slices provolone cheese
• 4 ciabatta rolls, (baked according to package directions)