A creamy condiment (like a garlicky mayo) that's perfect as a dipping sauce, to drizzle over meats, fish and veggies, wraps and sandwiches. You can keep it in the fridge for a week.
Slice the tops (about ¼) of the whole heads of garlic to expose the cloves, and leave the skins on.
Place them on a piece of aluminum foil, cut side up, and drizzle each open bulb with a teaspoon of oil. Season with salt and pepper, to taste. Wrap up the foil to enclose the garlic and place it on a baking sheet.
Bake for about 40 minutes, or until the cloves are tender. It might take a bit more or less.
Squeeze the soft pulp or remove each clove from its skin and transfer it to a small bowl. Allow the garlic to cool for about 10 minutes at room temperature, and then mash it with a fork.
Place ⅔ of the mashed garlic in a medium bowl. Stir in the mayonnaise, lemon juice, and mustard until integrated. Taste and add more mashed garlic if necessary, and adjust the seasonings (salt and pepper) as needed.
Keep refrigerated in a glass airtight container or jar for 5 to 7 days.