As soon as the milk is in the pot, cook the ravioli for about 6-8 minutes according to the instructions on the packet. Then the pasta and the sauce should be ready at the same time.
If the sauce needs to be stretched, add more milk. If the sauce needs to be thickened, mix some cold milk with flour, add to the sauce and bring to the boil again.
The sauce also goes well with other pasta or rice. Vegetables or lettuce are suitable as a side dish.