Chef Khristianne U on Instagram: "French Onion Soup Au Gratin 🖤 🤤Two of my most favorite things in one dish. 10/10 Full Recipe in Caption For Au Gratin: * 5 medium russet potatoes peeled * 2 cup heavy cream * 2 sprigs of fresh thyme * 1 sprig rosemary * 1 tbsp fresh or dried chives * 1 tbsp fresh or dried parsley * 1 cup shredded Gruyère cheese * 3 garlic cloves minced * 3/4 cup AP flour * salt and pepper to taste For Caramelized onions: - 4 white onions thinly sliced - 2 tablespoons butter -