Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Peel and dice the sweet potato into half-inch cubes, and cut the chicken breast into similar bite-sized pieces.
Place the sweet potatoes and chicken on the baking sheet, drizzle with olive oil, and sprinkle with sea salt, black pepper, and garlic powder.
Toss everything together until evenly coated, then spread in a single layer and roast for 20-25 minutes until the potatoes are tender and chicken is cooked through.
While the oven works, steam the shelled edamame in a small amount of water for 3-5 minutes until they are bright green and tender.
In a small jar or bowl, whisk together the tamari and sesame oil to create a simple, savory dressing.
Place the fresh baby spinach in a serving bowl and top with the hot roasted chicken, sweet potatoes, and steamed edamame.
Drizzle the tamari-sesame dressing over the top and enjoy immediately while warm.