Clean and wash beans. Cover and cook in boiling salted water for about 15 minutes. Drain well.
Peel and finely dice onions and garlic.
Heat oil in a large pan. Fry the mince vigorously. Fry the onions and garlic briefly. Sweat tomato paste with. Deglaze with tomatoes. Season with salt, pepper, paprika and a pinch of sugar. Simmer uncovered for approx. 10 minutes.
Heat 2 tablespoons of fat and sweat the flour in it. Stir in 1/4 L water, milk and stock. Bring to the boil and simmer for about 5 minutes. Roughly dice the Gorgonzola and melt in the sauce while stirring. Season with pepper and a little salt.
Layer the mince and beans in a large, greased baking dish. Pour the gorgonzola sauce over it. Sprinkle gouda on top.
Bake in a preheated oven (electric stove: 200 degrees / convection: 175 degrees / gas: level 3) for about 40 minutes.