Peel and quarter the onions. Wash the beans, remove the threads and cut in half. Wash and quarter the tomatoes and dice the yellow pepper.
Let the oil get hot in a saucepan. Leave out the bacon and then add the onion oils and cook for about 5 minutes. Then add the remaining vegetables and the can of tomatoes. Season to taste with salt, pepper and herbs from Provence. Add 2 liters of water and the stock cubes and simmer for 1 hour.