Sometimes the simplest things taste the best. When asparagus is in season, I love to drizzle them with olive oil, and some salt & pepper, and roast them in the oven. It's so simple, but so delicious.
After you've washed the asparagus, place them on a baking sheet. Drizzle some olive oil, enough to coat the asparagus, and sprinkle with salt and pepper. Put them in the oven at 350F for 20 mins, and you'll have yourself a very tasty side dish.
We ate ours outside on the patio. I highly recommend.