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 tbsp Rosemary, fresh & chopped , 3 tbsp Melted butter, 3 tbsp Olive oil, ¼ tsp Salt to taste