Slow Cooker Best Ever French Onion Soup

INGREDIENTS

large yellow sweet onions

1/2 stick

butter

1 tbsp

olive oil

3 tbsp

all purpose flour

2 tbsp

Worcestershire sauce

3 cloves

garlic (, minced finely)

10 cups

low sodium beef broth

salt & pepper

Baguette (, Sliced thinly)

Cheese (, such as swiss, mozzarella, gruyere!)