Roasted Rhubarb Vinaigrette

Last week, I had a few stalks of rhubarb leftover after a crumble-for-two. Before they got lost and rubbery beneath the early-CSA kale, arugula, and spinach in the crisper, I transformed them into a bright and tangy topping for all that early-CSA kale, arugula, and spinach in the crisper. Those sturdy, deep, dark greens demand…