Bring water to a boil. Then add salt and penne and simmer for about 8 minutes (or as you like).
Fry the onions and garlic in a pan with olive oil. Add the finely chopped spinach and let it simmer for a few minutes. Then add the penne, pesto, cream, white wine and honey and let it boil down until a sauce is made. Finally, season with salt and pepper.