Veggie Lasagna Stuffed Portobello Mushrooms

Name: Veggie Lasagna Stuffed Portobello Mushrooms
Ingredients: * 1 teaspoon olive oil; * 2 loose cups baby spinach, chopped; * 3 cloves chopped garlic; * 1/3 cup chopped onion ( I used 1/2 large white onion); * 1/3 cup chopped red bell pepper ( I used a whole red bell pepper); * kosher salt; * 3/4 cup part skim ricotta; * 1/2 cup grated parmesan cheese; * 1 large egg; * 4 large basil leaves, chopped; * 4 large portobella mushroom caps; * 1 cup marinara sauce ( I used Raos our favorite); * 1 cup part skim shredded mozzarella; * 1/2 teaspoon crushed red pepper flakes (I added this in because I like a touch of heat)