Heat oil in a large skillet over medium heat. Add onion; cook and stir until translucent, 5 to 7 minutes. Add tofu; cook and stir until lightly browned, about 5 minutes. Stir in water chestnuts; cook until softened, about 2 minutes.
Stir pea vines and ginger into the skillet; cook and stir until pea vines are wilted, about 2 minutes. Add crushed tomatoes and rice wine. Cook until warmed through, about 2 minutes. Sprinkle sesame seeds on top.
