Wash the meat, dab dry. Rub with salt and pepper. Wash the sage, remove the leaves, put something aside for garnishing. Cover meat with ham and sage. Sprinkle with 3 tablespoons of parmesan.
Roll up the meat and tie up with kitchen string. Peel and chop the onions. Heat lard in a roaster. Brown the roulade in it. Add 3/4 of the onions and fry. Deglaze with 1/2 litre water and white wine.
Cover and cook in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 30 minutes. Add cream and remaining Parmesan cheese and braise in the open roaster for another 15 minutes. Clean, wash and break the beans into pieces.
Cook in salted water for about 15 minutes. Remove the roulade and keep warm. Puree the stock. Bind with sauce thickener and season with salt and pepper. Fry the rest of the onions in hot fat. Drain the beans and toss them.
Arrange everything and garnish with remaining sage.