Wash and clean the spinach thoroughly. Peel and finely dice the onion and garlic. Heat 1 tablespoon of oil in a large saucepan, fry the onion and garlic in it. Add spinach dripping wet, cover and let it collapse.
Season spinach with salt and pepper, drain. Wash the meat, pat dry, cut a pocket in each fillet. Put 2 slices of ham into each fillet. Heat 2 tablespoons of oil in a frying pan, fry the fillets on each side for about 3 minutes, remove.
Pour 200 ml water and milk into the frying fat, bring to the boil. Stir in stock. Cut the gorgonzola into cubes. Gradually stir in gorgonzola and 150 g of gouda and let it melt. Season with salt and pepper.
Spread the spinach in an ovenproof dish. Place the fillets on top. Pour cheese sauce over them. Sprinkle with 50 g Gouda. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 15 minutes.
Cook pasta in boiling salted water according to package instructions. Drain the noodles and let them drain. Melt the butter in a pan, toss the noodles in it. Serve chicken fillets with the noodles.