Cheese & Spinach Stuffed Portobellos

Ingredients:

  • 4 large portobello mushroom caps
  • ¼ teaspoon salt
  • ¼ teaspoon freshly ground pepper, divided
  • 1 cup part-skim ricotta cheese
  • 1 cup finely chopped fresh spinach
  • ½ cup finely shredded Parmesan cheese, divided
  • 2 tablespoons finely chopped kalamata olives
  • ½ teaspoon Italian seasoning
  • ¾ cup prepared marinara sauce