Ingredients
Instructions
- If you plan to serve this with pasta, put your pasta on to cook now. This sauce would also complement certain meats, chicken, for instance.
- Peel and finely chop onion.
- Melt the butter, fry the onion, stir in the flour and fry until golden.
- Gradually add the stock, and bring the sauce to the boil, stirring constantly.
- Add the wine and sour cream and allow to simmer on low heat.
- Season the sauce with salt, pepper and nutmeg.
- Add the Mozzarella cheese cubes to the sauce and allow to melt over low heat.
- Stir the chopped chervil (or herb of choice) into the sauce.
- Beat the egg yolk with 2 tblsps of sauce, then blend into the rest of the sauce.
- Add cooked pasta of choice (recipe suggestion, tortellini, although I used the homemade gnocchi mentioned above).