• Preheat your oven or air fryer to 375 degrees Fahrenheit (190 degrees Celsius).
• Start with whole bulbs of garlic. Peel away any loose pieces of skin, leaving the cloves inside the peel. Keep the root side intact and with a big, sharp knife slice off the very top to expose the cloves inside.
• Place each of the garlic bulbs on a small sheet of aluminum foil. Drizzle them with the olive oil, ensuring that each head is well coated. Sprinkle them with salt.
• Wrap each head of garlic tightly in its own piece of the aluminum foil before placing them in a baking dish.

To roast in the oven:

• Bake at 375 degrees Fahrenheit (190 degrees Celsius) for 45-50 minutes, until the garlic cloves become soft.

To roast in the Air Fryer:

• Air fry at 375 degrees Fahrenheit (190 degrees Celsius) for 15 minutes in foil. Open the foil of each garlic head and air fry for 5 more minutes.

To keep:

• Cool the garlic heads and squeeze them out in a jar. At this point, you can mash them slightly or leave them as they are. Press down on them gently to remove the air from between them. Cover in olive oil and keep in the fridge.