Balsamic sweet potato mash

Ingredients (4 servings): 1kg orange sweet potato, peeled, diced 50g butter, chopped 50ml extra-virgin olive oil 1 tablespoon balsamic vinegar   Method: Cook sweet potato in a saucepan of boiling, salted water over medium-high heat for 10 minutes or until tender. Drain in a colander. Return sweet potato to warm saucepan. Shake saucepan over low heat…