French Onion Dip Sandwiches (Slow Cooker)
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