French Onion Dip Sandwiches (Slow Cooker)
- Category: Beef Sandwiches
- Author: TheElusivePastry
- Rating: 4.71
- Prep time: 40 min
- Cook time: 431 min
Ingredients
- 5 tablespoons olive oil, divided
- 2 large onions, thinly sliced
- 3 tablespoons butter, divided
- 1 teaspoon white sugar
- ½ teaspoon salt
- 3 cloves garlic, minced
- 9 tablespoons water
- ¼ cup dry vermouth
- 2 ½ cups beef stock
- 1 tablespoon Worcestershire sauce
- 1 tablespoon soy sauce
- 1 teaspoon fresh thyme
- 1 bay leaf
- ¼ teaspoon ground black pepper
- 3 pounds rump roast
- salt and ground black pepper to taste
- 8 French rolls, split
- 1 (6 ounce) package grated Gruyere cheese
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