Prepare corn as desired (grilled, roasted, boiled). If grilling with the husks on, see notes below.
In a medium bowl combine the mayonnaise, salt and pepper, chili powder, and the juice of half of lime. Taste and adjust seasonings as desired.
To prepare a cob, squeeze a wedge of lime juice on each cob before adding the chili-lime mayo. Serve with additional wedges of lime at the table.
Notes
Grilling corn with the husks on:
Peel back the husks until they are approximately 2 inches away from the end. Remove all the silk. Bring the husks back up around the corn making sure to cover all the kernels.
Fill a sink with cold water and soak the corn for about 30 minutes to preserve the sugars from turning starchy. Drain and remove the excess water.
Use a piece of husk as a tie if you want to close the husks completely while grilling (optional). Lightly oil the grates of a preheated grill and cook over a medium flame or medium-hot coals for 15 minutes. Turning occasionally.
Open the husks very carefully, proceed with recipe.