Buttery polenta serves as a soft, savory bed for asparagus and peas in this verdant, vegetable-rich main course. Sautéed shallots add sweetness, while fresh mint lends brightness to a satisfying yet light meal. You can substitute any soft herbs for the mint or use a combination for the most complex flavor. And, if you’re short on time, instant polenta will work in place of regular, too. Just follow the directions on the package to cook it.