Add the shallots and garlic and sauté until softened ... Set the oysters into the salt, rounded-side down. Roast until the top shells start to loosen and the oysters start to open, about 15 ...

Nestle potatoes in salt, leaving space between each potato. Add bay leaves and shallots to dish. Cover with foil and crimp edges to tightly seal. Bake for 1 hour and 15 minutes; remove pan from oven.