2 lb medium sweet potatoes, cut lengthwise
2 T olive oil
1 salt and pepper
1 large pinch cayenne pepper
In a large saucepan of boiling, salted water, simmer the potatoes until almost tender, about 5 minutes.
Drain, transfer to a large bowl and toss with the olive oil, salt, pepper and cayenne.
Grill over moderate heat for about 15 minutes, turning, until tender and lightly charred.