Preheat oven to 425 degrees F (220 Celsius)
Lightly oil baking dish. I prefer a metal pan as it just seems to roast better.
olive oil for pan
Pat halibut dry and place on oiled baking pan. Season with salt and pepper.
1 lb halibut fillets, salt and pepper for seasoning
Layer the pesto evenly on the fish. It looks like a real thick layer and that is just what you want.
1/2 cup pesto
Sprinkle nuts on top and place in preheated oven.
1/2 cup walnuts
Bake for 15 minutes. You will notice the walnuts are just starting to get toasted. That is perfect. The rule for baking fish is 10 per inch of fish at 425 degrees. With the thickness of mine, 15 minutes was perfect.