Drain tofu and chop into small chunks. Mash until it resembles cottage cheese.
Mince onion and saute in a few tablespoons of water in a frying pan or skillet. Cook until onion becomes clear or translucent.
Add 2 cups of spinach. If using fresh spinach, cook for just a few minutes, until the leaves begin to wilt. If using frozen spinach, mix thoroughly with the onions and cook for just a few minutes.
Drain any excess water in the spinach-onion mixture. Then combine with the mashed tofu and mix well.
Add seasonings and adjust to taste.
Spread a layer of tomato sauce on the cooked lasagna noodles. Add the tofu-spinach filling on top.
Gently roll the lasagna noodles jelly-roll fashion and place in a baking dish. Fill up the dish with 6-8 lasagna rollups.
Spread a generous helping of Pasta Perfect Tomato Sauce on top of each Lasaga Rollup. Bake in a preheated 350 degree oven for 20 minutes. Cook until it is heated through.
(Optional) Garnish with snipped fresh basil and/or fresh or dried parsley.