Thinly slice the tofu sheet and beef.
Finely chop the onion and garlic.
Heat olive oil in a pan and sauté the garlic and onion.
Add the beef and cook over medium heat.
Add the tofu sheet and stir-fry together.
Add heavy cream and milk, then bring to a boil.
Season with salt and pepper.
Plate and sprinkle with Parmesan cheese.