In a large bowl, add sweet potatoes, cubed onion, garlic, jalapeno, rosemary, butter, olive oil, and salt, and toss till combined.
1 Red onion, diced, 1 bulb Garlic, crushed and peeled, 1 Jalapeno or Serrano, chopped, 1 tablespoon Rosemary, fresh & chopped, 3 tablespoon Melted butter, 3 tablespoon Olive oil, ¼ teaspoon Salt to taste