Line large baking sheet with parchment paper. In a small dish, combine the fish seasonings: cumin, cayenne pepper, salt and black pepper then evenly sprinkle seasoning mix over both sides of tilapia.

Lightly drizzle fish with olive oil and dot each piece with butter. Bake at 350 for 10-15 min. To brown edges, broil for 3-5 minutes at the end if desired.

Combine all Taco sauce ingredients in a medium bowl and whisk until well blended.

To serve the tacos, quickly toast the corn tortillas on a large dry skillet or griddle over medium/high heat.

To assemble: start with pieces of fish then add remaining ingredients finishing with a generous sprinkle of cotija cheese and finally that awesome taco sauce! Serve with a fresh lime wedge to squeeze over tacos.