Wash the potatoes and cook for about 20 minutes. Quench, peel. Leave to cool. Then cut into slices
Bring milk and 1 pinch of salt to the boil. Simmer the pasta for about 10 minutes until the
liquid is almost absorbed
Peel and slice the onions and garlic. Fry in 1 tbsp. hot butter until golden brown. Grate cheese roughly. Fill pasta and potatoes alternately with the cheese into an ovenproof dish. Spread onions and garlic over it. If necessary, bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/gas: level 3) for 10-20 minutes
Peel apples, remove seeds. Cut into slices. Fry in 1 tbsp. hot butter and sprinkle with sugar. Add juices and stew everything for about 5 minutes until soft. Leave to cool slightly. Serve with the casserole