Sauté leeks in 1 butter until tender, season with salt and pepper
Boil peeled and chunked Yukon gold potatoes until fork-tender
Roast carrots with olive oil, salt and pepper until caramelized
Season and sear bone-in, skin-on chicken thighs until crispy and cooked through
Mash potatoes with 4 butter, warmed milk or half-and-half, and 2 grated garlic cloves
Fold sautéed leeks and optional crème fraîche into mashed potatoes
Make pan sauce by sautéing diced shallot in 2 butter, deglaze with white wine if using, add chicken broth and lemon juice and zest
Plate mashed potatoes, top with crispy chicken thighs and roasted carrots, drizzle with lemon shallot pan sauce
Garnish with fresh sliced chives and serve
