Make the "breading" by pulsing the pistachios, cheese, spices and oats in a blender or food processor.
½ cup shelled pistachios, 2 tablespoon grated Parmesan cheese, 1 teaspoon garlic powder, 1 teaspoon onion powder, 1 teaspoon dried parsley, ¼ cup old-fashioned oats, 6 tilapia fillets
You may want to add a pinch of salt. I thought the salt from the pistachios would be enough but they were a little under seasoned.
Line a large sheet pan with aluminum foil and spray with non-stick cooking spray.
Coat the fish in the breading and place on the sheet pan.
Bake for 10-12 minutes until the fish is white and flaky.
Notes
I don't dredge the fish in egg because I find it to be moist enough to hold the breading without it. I'd rather save the egg if I can and this way makes less of a mess.