Add the spinach and the beans, water and then all the Italian seasoning, crushed red pepper flakes, and season with the salt and pepper. Stir to combine. Sprinkle the cheese evenly over the top, then bake until the cheese has melted and browned in spots; for about 8 to 10 minutes. For more browning, switch to the broiler setting and leave under the broiler for about 2 minutes. Serve and enjoy immediately.