Make a bed of arugula on each of four plates. Slice the squashes into long thin ribbons (a mandoline is ideal for this). Toss them with the olive oil and lemon juice, then lay the strips on the arugula; pour any remaining dressing over them.
Garnish with the Parmesan and tomato confit; drizzle with a little of the confit’s oil if you have it. Sprinkle with salt an