1. Take one big sweet potato per head. Peel, half across and cut into chunks that vaguely resemble big fries.
2. Mix with a glug of olive oil, a tablespoon or two of balsamico, some coarse salt, a dash of cayenne and a dash of cumin.
3. Spread out on a baking sheet and roast at 400 degrees for about 30 minutes. You want them to get tender but golden and caramelized on the outside, even slightly charred at the edges. Depending on your oven, they might need a final 30 second blast under the broiler.
4. Eat, with tomato chutney (or ketchup if you are a little less of a snob) and arugula salad on the side.