Leave garlic cloves whole; quickly rinse button mushrooms in water and pat dry with a kitchen towel, then cut in half.
In a pan, add olive oil and garlic. Cook over low heat for 3-4 minutes until the outside is golden and the inside is soft.
Once the garlic is cooked, add the mushrooms and sauté for 2-3 minutes until the moisture evaporates and the mushrooms begin to soften.
Just before turning off the heat, add a pinch of salt and a dash of pepper.