To make chipotle slaw:
In large bowl, combine slaw mix, green onions, and corn.
In small food processor, add chipotle chile, mayo, sour cream, buttermilk, lime juice, cumin, garlic powder, and salt.
Pulse until well combined.
Add cilantro and mix with spoon to combine.
Add to slaw mixture and stir well to combine.
Let chill in refrigerator.
To make fish tacos:
Put egg into shallow bowl and whisk.
Put finely crushed tortillas, cumin, and chili powder in separate shallow bowl and mix well.
Dip each strip of fish into egg mixture, followed by tortilla mixture.
Once fish is coated, heat oil in large skillet.
Cook the fish until completely cooked, about 3-4 minutes on each side.
Place 1-2 pieces of fish in each taco shell, then top with chipotle slaw.