Llapingachos are traditionally filled with a fresh Ecuadorian cheese, such as queso fresco or queso criollo. These cheeses are mild, milky and slightly salty. For an easy-to-find substitute, use shredded Monterey Jack or low-moisture mozzarella; both have a similarly mild flavor and the added benefit of becoming nicely melted and gooey inside the potato pancakes. Use natural unsweetened creamy peanut butter for the salsa de maní. Both creamy and slightly textured varieties will work, though creamy will give you the smoothest sauce and will be most like the product found in Ecuador. Be sure to stir the peanut butter well before measuring to fully reincorporate any separated oil. Natural peanut butter also keeps the sauce more savory and allows the flavors of the achiote, cumin, lime and cilantro to shine.