Ingredients
- 4 tablespoons unsalted butter divided
- 4 cups sweet onions sliced, about 2 pounds
- 2 tablespoons dry sherry
- 1/2 cup unsalted beef stock preferably homemade
- 1 sprig fresh thyme leaves stripped from the stem
- 1 cup grated Gruyere cheese
- 4 slices Italian bread or French
- kosher salt
- pepper
Nutrition
- Calories : 620 calories
- Carbohydrate : 38 grams
- Cholesterol : 120 milligrams
- Fat : 42 grams
- Fiber : 4 grams
- Protein : 23 grams
- SaturatedFat : 25 grams
- Sodium : 920 milligrams
- Sugar : 10 grams
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