Snap off and discard the tough ends of the asparagus. Arrange the spears in a single layer on a rimmed baking sheet. Drizzle with the oil and roll the spears back and forth to coat. Sprinkle with salt and pepper.
Roast until crisp-tender and browned in spots, about 5 minutes, depending on the thickness of the spears. Serve hot or at room temperature.
Variation: you can also grill the spears over medium-high heat. To keep them from falling through the grate, place them in a vegetable basket or on a mesh grilling screen. Lightly brush with oil and grill, turning and rolling with tongs as needed, until they are crisp-tender, about 5 minutes, depending on the thickness of the spears. It’s fine if the tips get a little charred. For an extra treat, cut a couple of lemons in half. Place them on the edge of the grill, cut-side down, until they get a little smoky and show grill marks. Squeeze the warm lemons over the asparagus (or any grilled vegetable) just before serving.
What else works? you can replace the asparagus with whole tender green beans. You can also use ramp bulbs, scallions, or baby leeks; increase the roasting time to 10 to 15 minutes.