Potato Leek Gratin

2tablespoons unsalted butter, more for greasing the pan; 2large leeks, trimmed and halved lengthwise 1 ½pounds peeled Yukon Gold potatoes 1teaspoon kosher salt ½teaspoon ground black pepper 2thyme sprigs 1cup heavy cream 1fat garlic clove, finely chopped 1bay leaf ¼teaspoon freshly ground nutmeg ¾cup cheese of choice, grated –Heat oven to 350 degrees and butter a 2-quart gratin dish. Wash the leeks to remove any … More Potato Leek Gratin