Peel and cube the sweet potato, then boil in a pot of water until fork-tender.
Drain the sweet potato and mash thoroughly with the ghee and a pinch of sea salt until smooth and creamy.
Heat half of the olive oil in a large skillet over medium-high heat.
Season the salmon fillet with salt and pepper, then place in the skillet skin-side down.
Sear the salmon for about 4-5 minutes per side until the exterior is golden and the center is just cooked through.
Remove the salmon from the pan and set aside.
Lower the heat to medium and add the remaining olive oil and minced garlic to the same skillet.
Sauté the garlic for 30 seconds until fragrant, then add the fresh spinach.
Cook the spinach until just wilted, then remove from heat.
Plate the sweet potato mash, top with the garlic spinach, and place the seared salmon on top.