Switch the oven on to 200C/400F and put the baking sheet with the oil on into the oven.
Peel and cut your potatoes into cubes. Dry the cubes of potato.
When the oven has reached temperature, bring out the tray of hot oil and carefully put in the potato cubes and cover in the oil.
Return to the oven for 40 - 50 minutes until they are beginning to turn golden all over. Shuffle the potatoes around a couple of times during this cooking time.
Add the garlic, rosemary, thyme and salt and pepper to the potatoes and cook for another 5 minutes.
Optional: To cook in an Air Fryer
Peel and cut your potatoes into cubes. Dry the cubes of potato.
Put the potato cubes into the Air Fryer and cover in the oil. Bake at 200C/400F for 20 minutes.
Shake vigorously halfway through the cooking time.
Add the garlic, rosemary, thyme and salt and pepper to the potatoes and cook for another 5-10 minutes, until the potatoes are golden brown.
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