Cacio e Pepe
Spaghetti, Pecorino Romano and black pepper — that is the entire ingredient list. There is no butter, oil or cream in it; the sauce is grated cheese loosened with starchy pasta water, and it comes together off the heat in about thirty seconds.
At a glance
Ingredients and method are in the app
Kitchen Pantri holds the full ingredient list and step-by-step method for Cacio e Pepe, checks it against what is already in your pantry, and adds anything missing to your shopping list. The app is free to use; you set up a Pantri account when you first open it.