Preheat oven to 425 degrees FCut sweet potatoes into small cubes (about ¼"x1/4"x1/4")
Toss in 1 tbsp olive oil
Sprinkle with salt and pepper as desired
Roast in oven for ~20 minutes, flip potatoes & roast for another ~20 minutes. (Time may vary based on your oven. You want the potatoes to be browning and forming a slight "crust")
With about 5 minutes left on the time potatoes are in the oven, put a large pan on the stove at low-medium heat. Add the olive oil, minced garlic, rosemary, & oregano. Stir occasionally to ensure spices don't burn.
When potatoes come out of the oven, add them to the pan and turn the stove up to medium heat.
Continue stirring until potatoes are coated in spices & have formed a semi-firm crust.