Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Toss the cubed butternut squash on the baking sheet with 1 teaspoon of olive oil and a pinch of sea salt.
Roast the squash for 20-25 minutes, tossing halfway through, until the edges are tender and caramelized.
While the squash roasts, cut the salmon fillet into 1-inch cubes and place them in a medium mixing bowl.
Season the salmon cubes with turmeric, garlic powder, sea salt, and black pepper, tossing gently to coat every side.
Heat a non-stick skillet over medium-high heat with the remaining 1 teaspoon of olive oil.
Add the salmon bites to the hot pan in a single layer, searing for 2-3 minutes per side until a golden crust forms and the centers are just opaque.
Arrange the fresh baby spinach in a serving bowl and top with the warm roasted squash and seared salmon bites.
Finish the dish with a bright squeeze of fresh lemon juice before serving.