Preheat the oven to broil. Place the top rack about 7 to 8 inches below the coils. Line a large, rimmed, baking sheet with heavy -duty aluminum foil for easy cleanup, and to wrap the peppers to steam.
Scatter the peppers on the sheet and broil for 5 to 7 minutes or until the peppers are blistered. Using tongs, turn each pepper and place back under the broiler for another 5 to 7 minutes. Repeat this process until the peppers are blistered, slightly charred on all sides.
Remove the baking sheet from the oven. Everything will be incredibly hot. Very carefully, pull the sides up from the edges of the sheet pan and encase the peppers. This will allow the steam to loosen the skins and be easily removed from the peppers. Let the peppers sit and steam for about 5 minutes.
Carefully, open the foil and remove the peppers to a cutting board to finish cooling.
Using disposable gloves here will help… Remove the seeds and skins and discard. Roughly chop the peppers and place them in a bowl to finish cooling, if they were not already completely cooled. (Adding the cheese to the warm peppers will melt the cheese and that’s not what you want here for pimento cheese.)
Once the peppers are cooled, add the remaining ingredients. Combine very well. Taste for seasoning and adjust as you’d like.
Refrigerate any leftovers up to 5 days in the refrigerator in an airtight container. I would not suggest freezing the pimento cheese, as the texture will be altered. Dairy does not do well freezing and thawing.