Preheat oven to 425 degrees F.
- Combine yogurt, green onions, cilantro, lime juice and zest, garlic, salt and pepper in a bowl; set aside.
- Place fish on a baking sheet brushed with vegetable oil. Combine cumin, paprika and red pepper in a small bowl and sprinkle over both sides of fish filets. Bake at 425 degrees F for 8- 10 minutes or until fish flakes easily with a fork or until desired degree of doneness.
- Break fish apart with a fork. Heat the tortillas according to package directions. Divide the fish evenly between the tortillas, and top with lettuce, tomatoes and crema. Serve immediately.