Chilli oil is perfect to give as a homemade edible present for use in salad dressings, stir-fries or on pizzas. Make in small amounts, though, as it doesn't keep for long!
Gently warm the olive oil in a saucepan. Add the chilli flakes and whole chillies to the oil and heat for 3-4 minutes. Remove from the heat and leave the oil to cool slightly.
When the oil has cooled, carefully strain it into a sterilised, sealable glass bottle using a funnel. Add dried chillies from the pan and seal the bottle.
Keep the bottle in the refrigerator and use within one week.