Preparation Mix chiles and salt in a small bowl; let sit 10 minutes. Mix in mayonnaise and hot sauce. DO AHEAD: Serrano mayo can be made 3 days ahead. Cover and chill.
Preparation Mix chiles and salt in a small bowl; let sit 10 minutes. Mix in mayonnaise and hot sauce. DO AHEAD: Serrano mayo can be made 3 days ahead. Cover and chill.