Make this recipe a recipe that people in that category can eat. categories: ['low_calorie'], recipe: heat butter and oil in heavy, large saucepan over medium heat. add onions, garlic and salt, and cook 5 minutes, stirring often. reduce heat to very low, and cook, stirring occasionally, 50 to 60 minutes, until onions are very tender and brown. stir in flour, and cook 3 to 4 minutes, stirring constantly. blend in broth, sherry and mustard. cover, and simmer 15 minutes, stirring occasionally. stir in sherry vinegar. preheat broiler, ladle soup into six heat-proof bowls. top each with slice of toast and grated cheese. broil until cheese is bubbly and golden, about 1 to 2 minutes. serve hot.

Target recipe: in medium saucepan, heat butter and saute the onions on low heat for 20-30 minutes until soft and golden brown, stirring often. add the garlic, thyme, salt and pepper and cook another 4-5 minutes. add beef broth and grape juice. cover and simmer for 15 minutes. taste for seasoning. (can be made ahead up to this point.) preheat oven to 400 degrees. place soup in 6 ovenproof bowls. top each bowl with a slice of french bread and about 1/4 cup grated cheese. bake for 5 minutes until cheese has melted. serve at once. serves 6.