Bring the ricotta, crème fraîche and milk to the boil in a saucepan, stir in the stock and simmer over a low heat for about 5 minutes. Cook the pasta in boiling salted water according to the instructions on the packet. Wash mint, dab dry, put something aside for garnishing. Cut remaining mint into fine strips. Pass the sauce through a sieve, season to taste with Noilly Prat, salt and pepper.
Drain the pasta and let it drain. Mix the sauce with the noodles and mint. Arrange on plates and spread caviar on top. Garnish with set aside mint