Rinse the quinoa under cold water and place in a small pot with 1/2 cup of water or vegetable broth.
Bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes or until water is absorbed and quinoa is fluffy.
Pat the salmon fillet completely dry with a paper towel and season both sides with sea salt and black pepper.
Heat half of the avocado oil in a non-stick skillet over medium-high heat.
Place the salmon in the pan and sear for 4-5 minutes until the skin is golden and crisp, then flip and cook for another 2-3 minutes.
Remove salmon from the pan and set aside to rest.
In the same pan, add the remaining oil and the minced garlic, sautéing for 30 seconds until fragrant.
Add the baby spinach to the pan and toss until just wilted, about 1-2 minutes.
Plate the cooked quinoa, top with the sautéed spinach and the salmon fillet.
Drizzle the entire dish with fresh lemon juice before serving.