This is a classic French onion soup, with a spicy twist. Try really hard to find the oxtails to make it. They’re not essential, but they give the soup an ideal mouthfeel and flavor. Include a mix of hot peppers (e.g., serrano, jalapeño, cayenne, cascabel) and mild (red and green bell, wax, poblano). And make sure you remember which seven onions and seven peppers you use, because someone will want to know.