Place the garlic in a small saucepan with the olive oil and bring to a boil. Lower the heat and simmer for 10 minutes.
With a vegetable peeler, cut large strips of zest from each lemon and add it to the garlic oil.
Add the red pepper flakes and salt and allow the oil to sit at room temperature until the flavors are infused. Store the oil in the refrigerator.
2011, Ina Garten, All Rights Reserved