Slice the nectarines into wedges and cut the tomatoes into generous pieces, keeping all their juices.
Scatter over the basil and mint leaves, then add the toasted nuts.
Whisk together the olive oil, lemon juice, salt and pepper and spoon it gently over the salad.
Leave everything to sit for 20 minutes before serving. The juices from the tomatoes and nectarines mingle with the dressing to create something that is almost good enough to eat with a piece of bread alone.