Gratin pommes de terre, patate douce, carotte
large sweet potato (about 1 lb or 490 g) • carrots (about 9 oz or 246 g) • medium potatoes (about 1 lb 2 oz or 521 g) • onion • olive oil • Oregano • Salt • Pepper • plain Greek yogurt (about 385 g) or sour cream • shredded cheese (gruyere, mozzarella, parmesan, etc., about 1.4 oz or 40 g)
