Pasta ribbons in lemon sauce with spinach, leeks and tomatoes

I’m not being coy here but, honestly, I can’t remember where I first saw the idea of pasta with lemon, a cross-breed of comfort food and refreshment. The combination of vegetables in this version isn’t sacred but I wouldn’t stray far from the essential mix of fresh greens, mild onions and sweet dried tomatoes. Some puy lentils are excellent in it but you would need to be sure you want to add such an earthy element to an otherwise light and heady mix. I’ve given quantities for two people for