Cut the potatoes into pieces of equal size and put in a large pan with cold, salted water. Bring to a boil, cover and cook for 15-20 minutes, until completely cooked through.
Squeeze the potatoes out of the water and add the Filippo Berio tomato and ricotta pesto. Whisk with a mixer and season with salt and freshly ground black pepper. Serve sprinkled with Filippo Berio extra virgin olive oil.
You can season the potatoes with any Filippo Berio pesto. Filippo Berio classic pesto goes well with lamb leg.