Heat oven to 200C/180C fan/gas 6. Toss
the sweet potato with the oil and some
seasoning. Spread on a baking parchment-lined
baking tray and roast for 30-35 mins
until tender. Cool to room temperature.
Whisk the dressing ingredients with
a little more seasoning. Pile the potato
onto a serving platter and drizzle over
the dressing. Scatter over the feta and
nuts, and very gently toss with your
hands so you don’t break up the potato.