Mary's French Onion Soup

Yield: 6 Servings
Categories: Slow Cooker, French, Family
2qtBeef stock
4Beef bouillon cubes
6cMaui onions; thinly sliced
1/2Stick butter
1Clove garlic; minced
1/4cExtra virgin olive oil
Salt and pepper; to taste
2tbSugar
2tbFlour
1tsWorcestershire sauce
1/4cSherry; *
1French bread loaf
6slMozzarella cheese
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