Steam the cauliflower florets until they are very tender, about 10-12 minutes.
While cauliflower steams, trim the woody ends off the asparagus and set aside.
In a food processor or blender, combine the steamed cauliflower, Greek yogurt, and minced garlic, blending until the mixture is smooth and creamy.
Season the salmon fillet with a pinch of sea salt and black pepper.
Heat the avocado oil in a non-stick skillet over medium-high heat.
Place the salmon in the skillet skin-side up and sear for 4-5 minutes until a golden crust forms.
Flip the salmon and cook for another 3-4 minutes until cooked through to your preference.
During the last 5 minutes of salmon cooking, steam the asparagus until bright green and tender-crisp.
Plate the cauliflower mash, top with the seared salmon, and serve alongside the steamed asparagus.
Finish the dish with a fresh squeeze of lemon juice over the salmon and vegetables.