I found this a few weeks back and LOVE IT!
So easy and oh so good.

4 fish filets – any white fish is fine. I use tilapia
1 cup panko
1 cup finely crushed corn tortilla chips
½ teaspoon salt
½ teaspoon cumin
2 egg whites
Cooking spray
8 corn tortillas
Shredded lettuce or cabbage
1 avocado, diced into medium chunks
Chipotle sauce (recipe follows)

Chipotle Dressing:
1/3 cup light mayo
1/3 cup light sour cream
1 clove garlic
1 tablespoon lime juice
1 tablespoon yellow onion
½ teaspoon fresh oregano
1 teaspoon smoked paprika

Heat your oven to 375F and spray a baking dish with non-stick spray.

All found off of 

http://www.evilshenanigans.com/2009/06/baked-fish-tacos-with-chipotle-dressing/