Preheat oven to 400 degrees.

Grease a glass baking dish with the coconut oil.

Place the cod fillets in the baking dish.

In a separate bowl, whisk together the mustard, honey, lemon juice, sea salt, and black pepper until smooth.

Using a spoon, spread the glaze over the cod.

Bake at 400 degrees for 15 to 20 minutes or until the cod is white throughout and flakes with a fork.

Remove from oven and serve with your choice of side.