Step 1

Preheat the grill to medium-high heat (400° to 450°).

Step 2

Shuck the corn and remove the silks. Peel the onion and cut it into quarters. Brush the corn and onion all over with olive oil.

Step 3

Grill the corn and onion, covered, until grill marks form, about 3 minutes per side. Remove from the grill and let them cool slightly.

Step 4

Cut the kernels off the cobs and dice the onion. Combine in a medium bowl with the red bell pepper, jalapeño, lime juice, vinegar, salt, cumin, pepper, and chili powder. Stir to combine.

Step 5

Just before serving, stir in the cilantro. Serve alongside tortilla chips.