Cut a medium-sized onion in dice-shaped pieces, and place them in a saucepan with an ounce and a half of butter; let it get a good golden color on the stove for five minutes; then add a tablespoonful of flour. Stir well, and moisten it with a pint of white broth (No. 99). Stir well again, until it comes to a boil; season with half a pinch each of salt and pepper. Add the cooked string beans, with a clove of crushed garlic, to the sauce; cook for ten minutes; place in a hot dish; sprinkle a teaspoonful of chopped parsley over it, and serve.