Preparation Cover potatoes by 1 inch in cold water in a 4-quart pot, then add 1 tablespoon kosher salt and bring to a boil over high heat. Reduce heat and simmer until potatoes are just tender, 12 to 15 minutes. Drain potatoes in a colander and transfer to a large shallow pan to cool quickly. If using a charcoal grill, open vents on bottom of grill, then light charcoal. Charcoal fire is hot when you can hold your hand 5 inches above rack for 1 to 2 seconds. If using a gas grill, preheat burners on high, covered, 10 minutes, then reduce heat to moderately high. Meanwhile, toss potatoes with 1 tablespoon oil and remaining teaspoon kosher salt, then push 2 or 3 potatoes onto each rosemary stem. Grill potato skewers directly over coals, turning over occasionally with tongs, until grill marks appear, 3 to 4 minutes total. Transfer potatoes to a platter and drizzle with remaining 2 tablespoons oil. Cooks' notes:·Potatoes can be boiled 1 day ahead and chilled, covered. Bring to room temperature before grilling. ·If you aren't able to grill outdoors, potatoes can be broiled in a shallow baking pan 3 to 4 inches from heat, turning over once, until lightly browned, 2 to 3 minutes.
Preparation Cover potatoes by 1 inch in cold water in a 4-quart pot, then add 1 tablespoon kosher salt and bring to a boil over high heat. Reduce heat and simmer until potatoes are just tender, 12 to 15 minutes. Drain potatoes in a colander and transfer to a large shallow pan to cool quickly. If using a charcoal grill, open vents on bottom of grill, then light charcoal. Charcoal fire is hot when you can hold your hand 5 inches above rack for 1 to 2 seconds. If using a gas grill, preheat burners on high, covered, 10 minutes, then reduce heat to moderately high. Meanwhile, toss potatoes with 1 tablespoon oil and remaining teaspoon kosher salt, then push 2 or 3 potatoes onto each rosemary stem. Grill potato skewers directly over coals, turning over occasionally with tongs, until grill marks appear, 3 to 4 minutes total. Transfer potatoes to a platter and drizzle with remaining 2 tablespoons oil. Cooks' notes:·Potatoes can be boiled 1 day ahead and chilled, covered. Bring to room temperature before grilling. ·If you aren't able to grill outdoors, potatoes can be broiled in a shallow baking pan 3 to 4 inches from heat, turning over once, until lightly browned, 2 to 3 minutes.