Make this recipe a recipe that people in that category can eat. categories: ['low_calorie'], recipe: in a large saucepan over low heat, melt butter with olive oil. cook onions in mixture, stirring occasionally, for 30 minutes, until very soft, translucent and brown on the edges. sprinkle the flour over the onions and stir to combine. pour in beef broth, wine and water with bay leaves. bring to a boil, then reduce heat and simmer, uncovered, 20 to 30 minutes. preheat oven broiler. toast the bread slices. ladle the soup into 6 ovenproof bowls and place the bowls on a baking sheet. place a toasted slice of bread over each bowl and top with swiss cheese. place bowls under broiler until cheese is melted.

Target recipe: in a large skillet, sauté onions in butter until crisp-tender. transfer to an ungreased 5-quart slow cooker/crock pot. add the broth, worcestershire sauce, and bay leaves. cover and cook on low for 5 to 7 hours or until the onions are tender. discard bay leaves. top each serving with french bread and cheeses.