Preheat your oven to 400 degrees Fahrenheit.
Peel and dice the sweet potatoes into bite-sized pieces.
Drizzle the sweet potatoes with avocado oil and sprinkle with garlic powder, onion powder, salt, and pepper. Toss to coat.
Spread the seasoned sweet potatoes onto a lined baking sheet and bake for about 30-40 minutes, mixing halfway through.
Heat a large skillet over medium heat and cook the ground beef until browned, about 8 minutes.
Stir in Worcestershire sauce, garlic powder, onion powder, salt, and pepper into the beef and let simmer for a couple more minutes.
Assemble the bowls starting with a layer of shredded lettuce, followed by roasted sweet potatoes, seasoned meat, and toppings.