Peel onion and garlic. Chop onion coarsely, garlic finely. Peel or clean, wash and slice carrots and celery. Clean, wash and slice the green beans. Wash and quarter tomatoes. Wash thyme, pluck off leaves.
Heat the oil in a pot and sauté the onion and garlic. Sweat tomato paste briefly. Add thyme, bay leaf, 1 1⁄2 l water and broth and bring to the boil. Add prepared vegetables and bring to the boil again. Cover and cook for 20-25 minutes.
Drain the beans, rinse and drain. Add to the stew and continue cooking for about 5 minutes. Season to taste with salt and pepper. Rustic farmhouse bread tastes good with it.