braised leeks and lentils with arugula and yogurt

I’ve been pining for a springy way to combine leeks and lentils in an unfussy, one-pot, weeknight-friendly way but would get stuck on one thing: how annoying leeks are — and I say this from a place of adoration! I think leeks are one of the most stunning vegetables, an ombre of chromatic ringlets from buttery yellow to pea green and back to a pale shade of lima. They look exactly like spring (even though it’s climatically July outside but will be March again next week), and taste eve...