Preheat your oven to 425°F. Wash and scrub the sweet potato, then cut it into 1/2-inch thick rounds or cubes.
Toss the sweet potato pieces with a drizzle of olive oil, a pinch of salt, and a pinch of black pepper. Spread them evenly on a baking sheet.
Roast the sweet potatoes in the oven for about 20-25 minutes or until they are tender and begin to crisp on the edges, turning halfway through to ensure even cooking.
While the sweet potatoes roast, pat the salmon fillet dry. Finely chop the rosemary and thyme, then combine with a minced garlic clove, additional salt and pepper to create a herb crust.
Sprinkle the herb mixture generously over the salmon fillet, pressing lightly to adhere.
Heat a non-stick skillet over medium-high heat and sear the salmon, skin side down if applicable, for about 3-4 minutes per side or until the salmon is just cooked through and the herbs form a crispy crust.
In a separate pan, gently sauté the cooked spinach with a drizzle of olive oil, and season with a pinch of salt and pepper for 1-2 minutes until warmed through.
Plate the roasted sweet potatoes alongside the herb-crusted salmon and finish with a serving of sautéed greens. Enjoy your balanced and flavorful meal!