Ingredients Cheesy Vegy Crostini 16 oz Fresh Baby Spinach5 Mushrooms1/2 a Medium Sweet Yellow Onion diced small2 Tbsp Butter1/3 Cup Italian Breadcrumbs1 Baguette3 Cloves Garlic1/2 tsp Red Pepper Flakes1 tsp Kosher Salt1/2 tsp Black Pepper6 Tbsp Olive Oil 1/3Cup Shredded Mozzarella1/3 Cup Grated Parmesan