01 -
Set your oven to 400°F to preheat. Tear off some 5"x5" aluminum foil pieces. Carefully remove the fragile outer layers of the garlic, but leave the heads whole.
02 -
Take off about 1/4" from the top of each head, making the clove tops visible. Set them on their foil pieces.
03 -
Pour 1 teaspoon of olive oil over each garlic head. Wrap the foil snugly around them and place them in your baking dish.
04 -
Cook for 40 minutes or until soft and golden-brown. Let them cool a bit to handle easily.
05 -
Once cooled, squeeze or peel out the roasted cloves from their husks.
06 -
Put mayo, mustard, parmesan, lemon juice, salt, pepper, and garlic into a small blender or food processor. Blend till smooth and creamy.
07 -
Serve right then, or pop it in the fridge for later use.