Peel and wash the beans. Boil the beans and 1/4 litre of salted water. Cook over medium heat for 25-30 minutes. Peel onions. Finely dice 1 onion, cut 1 into slices. Halve 8 slices of bacon and roll up.
Cut the remaining bacon into small cubes. Wash the meat, dab dry and cut into pieces. Cut the sausages into thick slices. Put meat, sausages, onion slices and bacon on skewers.
Grill the skewers under the preheated grill for about 8 minutes. Turn from time to time. Season with salt and pepper. Pour the beans onto a sieve and collect the vegetable water. Leave the bacon cubes in a pot.
Fry the onion cubes briefly in it. Add fat and melt. Sweat flour in it. Add milk and vegetable water while stirring. Add the beans. Season to taste with salt, pepper and sugar. Wash parsley, chop finely and sprinkle over the vegetables.
Arrange the bean vegetables with the meat skewers. Baguette bread tastes good with them.