Clean the beans, wash them, put them into little boiling salted water and steam them for about 20 minutes. Pour into a sieve and drain well. In the meantime peel and chop the onions. Peel garlic and chop finely.
Heat the oil in a frying pan, add the crumbled minced meat and fry it all around, turning it well. Add onions and garlic and fry briefly. Add tomato paste and sauté. Deglaze with tomatoes, season with salt, pepper, paprika and 1-2 teaspoons of sugar.
Let simmer for about 10 minutes. Meanwhile melt the fat in a pot, dust with flour and gradually deglaze with stock and milk while stirring. Boil up while stirring. Roughly dice the gorgonzola, add and bring to the boil while stirring.
Season to taste with salt, pepper and sugar. Layer the minced meat and beans in an ovenproof dish. Pour sauce over it and sprinkle with Gouda. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 40 minutes.
Remove from the oven and garnish with parsley.