Preheat oven to 250°. Place garlic, herbs, and oil in an 8x8" baking dish or a small saucepan. Cover with foil and bake until garlic is tender, 60–75 minutes. (You’ll have to pop one out of its skin to test it; it should be soft and jammy.) Let cool.
Do Ahead: Garlic confit can be made 2 weeks ahead. Transfer to an airtight container and chill. Reheat over low heat before using.