Pat the salmon fillet dry with a paper towel and season both sides evenly with sea salt, black pepper, and garlic powder.
In a small bowl, whisk together the Greek yogurt, lemon juice, chopped fresh dill, and Dijon mustard until the sauce is smooth and creamy.
Heat the ghee in a large non-stick skillet over medium-high heat until it begins to shimmer.
Carefully place the salmon in the skillet, skin-side down, and sear for 4 to 5 minutes until the skin is golden and crispy.
Gently flip the salmon and cook for another 3 to 4 minutes, or until the fish reaches your preferred level of doneness.
While the salmon cooks, steam or lightly sauté the asparagus in a separate pan with a splash of water until it is bright green and snappy.
Plate the salmon alongside the asparagus and spoon the lemon-dill sauce generously over the fish before serving.