Steamed vegetables in parchment--in this case, asparagus and green beans--is a simple, easy, healthy way of cooking veggies. Simply wrap them up and slide them in the oven. No fuss. And, even better, no mess to clean up afterward.

1/2 to 1 lemon

5 to 8 ounces green beans (142 to 227 g)

12 to 16 spears asparagus

1 tablespoon or so olive oil

Sea salt and cracked black pepper

Preheat the oven to 400°F (204°C).
Cut four 12-inch squares of parchment paper (for a pretty effect) or aluminum foil (for a practical approach, if that’s all you happen to have on hand). Divide the lemon slices among the squares of parchment, placing 2 slices in the center of each square. Top the lemon slices with the green beans and asparagus, divvying them evenly among the squares. Drizzle the veggies with a little oil and sprinkle with the salt and pepper.
Working with 1 square at a time, bring 2 opposite edges of the parchment paper together so they meet in the center above the vegetables. Fold the edges over several times and crease them to seal. Bring the remaining sides of the parchment over the center and repeat, folding each over itself several times and creasing to seal. Place the parchment parcels on a rimmed baking sheet.
Roast the parchment parcels until the vegetables are just tender, 10 to 15 minutes. (There are several ways to tell if the veggies are done. You can guess. You can try to prod the vegetables through the parchment. Or you can carefully open one packet—this one will be yours—and cut through it with a sharp knife.)
Place each parcel on a plate, instructing guests to carefully cut an “X” in the center of their packet with their knives and being wary of the steam that will escape. Serve…and bask in the applause.