Crockpot French Onion Soup [adapted from Tyler Florence] makes a giant pot, about 8-10 servings 4 medium sweet onions, thinly sliced 3 garlic cloves, minced 4 tablespoons of butter 2 tablespoons balsamic vinegar (I used my favorite Fustinis!) 2 tablespoons brown sugar 3 tablespoons flour 8 ounces of beer 64 ounces of l…