Preheat oven to 425°. Place fillets on a baking sheet lined with aluminum foil. In a small skillet, melt ghee; stir in coconut aminos, mustard, sesame oil, pepper and salt. Brush half of the mixture over salmon.
Place green beans in a bowl; drizzle with remaining mixture and toss to coat. Arrange green beans around fillets on aluminum lined baking sheet. Roast until fish just begins to flake easily with a fork and green beans are crisp-tender, 14-16 minutes.