Preheat oven to 425 degrees. Line a baking sheet with foil.
Pour 1/2 tsp avocado oil on the foil and spread it around to lightly coat the foil. Place the salmon on the foil and spread the remaining 1/2 tsp all over the salmon.
Sprinkle the sea salt and pepper evenly over the salmon. Squeeze a little bit of lemon juice over the salmon and place the lemon on the foil lined baking sheet. Lay green onions on salmon. Cut the butter into tiny pieces and spread over the salmon.
Bake for 10-12 minutes, or until the salmon is cooked through but not dry. Salmon should be firm to the touch but slightly pink on the inside.
Take the cooked lemon and squeeze the remaining juice over the salmon to serve.