Preheat the oven to 400°F and line a large sheet pan with parchment paper.
Prep the sweet potatoes: Add cubed sweet potatoes to one half of the pan. Drizzle with avocado oil, season with salt, pepper, garlic powder, onion powder, paprika, and cumin. Toss to coat and spread evenly.
Prep the veggies: On the other half, add sliced bell peppers and red onion. Drizzle with more avocado oil, season with the same spices, toss, and spread evenly.
Roast: Bake for 30 minutes, flipping everything halfway through.
Broil for caramelization: Switch oven to broil and broil for 4–5 minutes, watching closely, until veggies and sweet potatoes are browned and fork-tender.
Cook the beef: While veggies are roasting, heat a skillet over medium. Brown the ground beef, breaking it up as it cooks. Drain grease if needed.
Season the beef: Add taco seasoning and water per the packet instructions. Simmer until thickened and flavorful.
Assemble: Divide roasted sweet potatoes between bowls. Top with seasoned beef, roasted veggies, shredded cheese, and a big scoop of guacamole.
Serve and enjoy!Pro tip: For extra heat, add sliced jalapeños or a drizzle of hot sauce before serving!