Panzanella
Toasted bread cubes tossed with ripe tomatoes, cucumber and red onion, then left to sit so the bread drinks up the tomato juice and the vinegar. It was invented to use up stale bread, and it is still the best reason to keep a heel of a loaf.
At a glance
Ingredients and method are in the app
Kitchen Pantri holds the full ingredient list and step-by-step method for Panzanella, 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.