Colcannon
Mashed potato folded through cabbage cooked slowly in butter, with sliced scallions stirred in at the end. The greens are half the dish rather than a garnish, which is what makes it different from plain mash.
At a glance
Ingredients and method are in the app
Kitchen Pantri holds the full ingredient list and step-by-step method for Colcannon, 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.