Preheat oven to 450°F. Peel sweet potatoes and dice into small cubes. Combine cubed sweet potatoes in a small bowl with 1 Tbsp. olive oil, ½ tsp. sea salt, and 1 pinch freshly ground black pepper. Mix until evenly coated. Place cubed sweet potatoes onto baking sheet and roast 20 minutes, until caramelized.