In a medium saucepan, add water and cook pasta according to package directions.
Heat olive oil in a deep skillet over medium-high heat.
Add garlic and saute for one minute. Add the zucchini and pepper. Cook for 5-7 minutes or until zucchini starts to soften. Stir in the tomatoes and cook another 2 minutes.
Add in the tomato sauce, oregano, basil, and red pepper flakes. Bring to a simmer and stir in the spinach and white beans. Cook until spinach is wilted and beans are heated through, about 3-4 minutes.
To serve, toss pasta and sauce together. Sprinkle with nutritional yeast.