Preheat the oven to 400ºF. Scrub the sweet potatoes and pierce each with fork to create some small holes for steam to escape. Place the potatoes on a baking sheet and roast for 45 minutes or until tender.
In a large skillet, cook the ground beef over medium heat until crumbled and almost browned through. Stir in the onion, bell pepper, and jalapeño, cooking until the vegetables are just tender and beef is cooked.
Add the tomatoes, tomato paste, and spices, and stir. Continue to cook until warmed through.
Slice the cooked sweet potatoes in half and scoop the ground beef mixture over top. Garnish, and serve!