• Preheat oven to 450 degree Fahrenheit temperature.
• Wash and peel the potatoes, dice in medium sized cubes.
• Place the diced potatoes in a large bowl.
• Also dice the onions in medium sized pieces, add them to the bowl with potatoes.
• Add salt, garlic and black pepper powder to the diced potatoes and onions.
• Also add the oil and mix everything well so the potatoes and onions are coated in oil and spices.

To roast seasoned potatoes and onions in the oven:

• Prepare a large baking sheet lined with good quality aluminium foil for easy clean up (do not use parchment paper in this recipe since we are baking in very high temperature and the parchment paper may catch fire).
• Place the seasoned potatoes and onions in the baking sheet. Arrange them in a single layer for even baking.
• Once the potatoes and onions are arranged in the baking sheet, place the baking sheet in the preheated oven and bake for about 20 to 22 minutes until the potatoes and onions are well roasted and slightly browned on the edges!
• Once the potatoes and onions are roasted, immediately transfer the baking sheet from the hot oven and allow the roasted potatoes and onions to cool down a bit.
• When it's right out of the oven, the contents will be very hot and the onions may slightly stick to the foil.
• Give it a few minutes to cool down and you will be able to easily transfer the roasted potatoes and onions to a serving dish.
• Enjoy the roasted potatoes and onions as an easy, delicious side dish with any meal like lunch, dinner or breakfast or enjoy it as a snack!