Preheat oven to 450 F on broil. Spread 1/2 cup frozen corn on silicone mat (make sure the mat is okay for 450 F). Place mat on tray on top rack of oven. Broil for 10-12 minutes until it starts to blacken. In my oven this takes 12 minutes, but keep an eye on yours.
Cut cucumber in half, then slice one half lengthwise. Remove seeds from one part.
Cut tomatoes in half and remove seeds.
Chop cucumber, tomatoes and peppers in small pieces and mix together.
Chop serrano pepper very fine. Remove seeds for less spice.
Add corn, serrano peppers and chopped cilantro to other ingredients (I didnt have cilantro this time). Add 1/2 teaspoon salt and 1/4 teaspoon sumac (or lemon or lime).
Enjoy or store in fridge overnight to allow flavors to blend.
