Step 1

Combine the greek yogurt, cilantro, lime juice, chili flakes and salt in a food processor; process until smooth. Set aside.

Step 2

Combine the smoked paprika, oregano, garlic powder, cumin, salt, and pepper in a sall bowl. Sprinkle evenly over both sides of fish.

Step 3

Heat oil in a large cast-iron skillet over medium-high heat. Add fish to pan; cook 3 minutes on each side or until cooked through.

Step 4

Serve over tortillas, if desired and top with cilantro lime sauce and avocado slices.