Combine walnuts, avocado oil, lemon juice, dijon mustard, garlic, dill, salt and pepper into your food processor. Pulse until the texture of walnuts is finely chopped- not quite a paste, but it should stick together.
Place your salmon on a sheet pan covered with foil that is coated in non-stick spray. Put a small amount of avocado oil and salt/pepper on your salmon. Then put your walnut mixture on top of your salmon (half on one fillet and half on the other).
Cook in the oven for 18 minutes or until salmon is cooked through- keep in mind everyone's oven is different so it may need another minute or two. If you are using an air fryer, cook on 375 degrees for 12 minutes.
Notes
You can cook this on entire fillet if you are cooking for a family, just double the crust recipe
I love asparagus as a side, but it would go great on quinoa, rice, or even on a salad.