Boil or steam pumpkin until soft. Drain and mash.
Heat oil in pan, add onion and garlic. Cook covered until onion is soft.
Add vegan sugar and vegan wine. Cook, stirring until almost all the liquid is evaporated. Stir onion mixture into pumpkin, mix well.
Place three lasagna sheets in greased long baking (deep) tray. Spread with half the pumpkin mix, then sprinkle vegan cheese, then spread 1/3 of tomato sauce. Repeat layers ending with remaining pasta sheets, remaining tomato sauce and sprinkle remaining cheese.
Bake in moderate oven for 30 minutes or until pasta in tender. This is a great recipe for when your having non vegos to dinner. They love it! So will you, and my kids can't get enough.