Spread 1/4 cup of salsa mixture into the botton of the baking pan. Add a layer of tortilla pieces, to completely cover the salsa. Top with 1/3 of the vegetables, a handful of spinach and some beans, and 1/3 of the cheese. Make a second layer of tortilla’s, salsa, vegetables, spinach, beans, and cheese. Top with a layer tortilla’s, salsa, vegetables, spinach, beans and cheese. Cover with aluminum foil.