Bring a large pot of salted water to a boil over high heat. Add the sweet potato pieces. Once the water returns to a boil, reduce the heat to medium and simmer for about 10 minutes until almost tender and a knife can go through without breaking a piece. Drain and transfer to a baking dish large enough to hold the sweet potatoes in a single layer. Preheat oven to 400 degrees F.
Whisk together orange juice, oil, sugar, and S & P in a medium bowl. Pour the mixture over the sweet potatoes and toss to coat evenly. Roast for about 20 minutes, turning them after 10 minutes, until the potatoes have started to brown and the sauce has thickened. Remove from the oven.
Meanwhile, cook the chorizo in a medium skillet over medium-high heat; use a wooden spoon of spatula to break it into smaller pieces as it cooks. After 5-6 minutes, when it has nicely browned and crisped, us a slotted spoon to top the hot potatoes.
Sprinkle the jalapeno, red onion and cilantro on top and toss gently to combine. Serve warm.