Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Peel the sweet potato and dice it into uniform half-inch cubes to ensure even roasting.
Toss the sweet potato cubes and broccoli florets on the baking sheet with 0.5 tbsp olive oil, 0.25 tsp sea salt, and 0.25 tsp garlic powder.
Roast the vegetables for 20 to 25 minutes, tossing halfway through, until the potatoes are tender and the broccoli edges are caramelized.
While vegetables roast, rinse the quinoa under cold water and combine with 1 cup of water in a small pot.
Bring the quinoa to a boil, then reduce heat to low, cover, and simmer for 15 minutes until the water is absorbed.
In a large skillet over medium-high heat, brown the ground beef with the remaining salt, pepper, garlic powder, and onion powder until cooked through.
Fluff the quinoa with a fork and combine it in a large serving bowl with the roasted vegetables, cooked beef, and the remaining 0.5 tbsp of olive oil.