
According to Ree, there should always be a potato dish at a brunch buffet.
For the potatoes: Preheat the oven to 400 degrees F.
Heat the butter in a large cast-iron, heavy-bottomed skillet over medium heat.
Toss the potatoes with the olive oil, salt, pepper and cumin. Add the potatoes to the pan cut-side down. Cook, without touching or turning, until golden and seared, 6 to 8 minutes. Transfer the pan to the oven and roast until the potatoes have a soft center and deep golden crust, 18 to 20 minutes.
For the cilantro garlic sauce: Meanwhile, mix together the cilantro, garlic, lime zest, lime juice, jalapeño, olive oil, salt and pepper in a small bowl, then set aside.
Remove the potatoes from the oven and place on a platter. Drizzle over the sauce, then garnish with the cilantro and sea salt to serve.