1 pound asparagus, trimmed
3 tablespoons olive oil (divided use)
Salt and pepper to taste
1 large red onion, cut crosswise into 1/2inch-thick slices and separated into rings
Eight 6- to 7-inch flour tortillas
l/2 pound pepper jack cheese, coarsely shredded
1/4 cup finely chopped fresh coriander

CUMIN LIME CREAM
1/2 cup sour cream
1 teaspoon ground cumin
1 teaspoon fresh lime juice