Add zucchini and corn to large skillet with garlic, oregano and black pepper. Sautee for 5 minutes. Add black beans and tomatoes and cook until pasta has finished cooking.
Drain pasta and put pasta back in pot. Add half the bag of spinach and top with a cup of the vegetable and bean mixture. Stir until spinach has wilted. Add remaining spinach and vegetable and bean mixture and stir until spinach has wilted.