Cook the pasta in plenty of boiling salted water for about 10 minutes until al dente
Peel and finely chop the onion. Steam in hot fat until translucent. Dice ham and fry briefly. Dust with flour and sauté until light yellow. Stir in 1/4 l water, milk and stock and bring to the boil. Simmer over a mild heat, stirring frequently, for about 5 minutes
Cut cheese into pieces, stir into the sauce and melt. Wash the sage, shake dry and cut into fine strips, except for a little to garnish. Season sauce with pepper and salt if necessary
Drain the pasta and serve with the sauce. Garnish with the rest of sage
Gnocchi go well with the ham and cheese sauce. The fresh potato dumplings from the refrigerated counter are ready in just a few minutes