Whisk together all of the ingredients in a small bowl until smooth. Taste and adjust seasonings if necessary.
Steak:
Rub your steak pieces with the seasonings (generously) and brown sugar.
Heat up 1 tbs oil in your pan. Work in two batches and cook the meat for a few minutes per side. They are thin so don't over cook them. Remove the pieces and heat the second tablespoon oil and cook the next batch of strips.
Assembly:
Heat your corn tortillas and then assemble tacos first with steak, then with corn salsa, next with some crema and lastly with some cotija cheese.