Pat the salmon fillet dry with a paper towel and season all sides evenly with sea salt, black pepper, garlic powder, and turmeric.
Heat the olive oil in a medium non-stick skillet over medium-high heat until shimmering.
Place the salmon in the pan, skin-side down if applicable, and sear for 4 to 5 minutes until the skin is golden and crisp.
Carefully flip the salmon and cook for an additional 3 to 4 minutes, or until the fish is just opaque and flakes easily with a fork.
While the salmon cooks, whisk together the Greek yogurt and lemon juice in a small ramekin until smooth to create the dressing.
Assemble the power bowl by layering the cooked quinoa and fresh baby spinach in a serving bowl.
Add the sliced cucumber and place the golden pan-seared salmon fillet on top.
Drizzle the lemon-yogurt sauce over the entire bowl and enjoy immediately.