Heat 1 tablespoon of olive oil in a large saute pan over medium heat, and cook the onions and garlic 5 minutes, until soft. Allow to cool.
In a large bowl, combine the onions, bell peppers, spinach, tofu, parsley, mozzarella, 1/2 cup flour, and 1 teaspoon salt. Stir to combine well. Shape mixture into patties, about the size of a small burger patty.
In a shallow bowl, whisk together the remaining 1/2 cup flour, bread crumbs, and 1 teaspoon salt. Dredge each side of the tofu patties in the flour mixture.
Heat 1-2 tablespoon oil in the large saute pan over medium/high and cook patties for 3 minutes on each side, until golden brown. Serve with marinara sauce for dipping.