(Meats, croquettes and entrees)
Put one tablespoonful of butter in a saucepan; add the chopped onion and carrot, and let slightly brown; add the flour and cook five minutes, stirring constantly. Then add the tomatoes, cloves, bay-leaf, salt and pepper. Cook slowly for half an hour, or until the tomatoes are soft and reduced to right consistency. Then add a tablespoonful of butter (a small piece at a time to prevent an oily line); strain; add more salt and pepper if necessary.