Peel and cube the sweet potato, then boil in a pot of salted water for 10-12 minutes until tender.
Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Toss the asparagus spears with half a teaspoon of olive oil, minced garlic, salt, and pepper.
Spread the asparagus on the baking sheet and roast for 10-12 minutes until tender-crisp.
Season the salmon fillet with a pinch of salt and black pepper.
Heat the remaining teaspoon of olive oil in a non-stick skillet over medium-high heat.
Place the salmon in the skillet skin-side down and sear for 4-5 minutes, then flip and cook for another 2-3 minutes until golden and cooked through.
Drain the sweet potatoes and mash them thoroughly with the Greek yogurt and a pinch of salt until smooth.
Plate the sweet potato mash, layer the roasted asparagus on top, add the salmon fillet, and finish with a fresh squeeze of lemon juice.