Roasted Garlic In Olive Oil. Chop vegetables and place in a large bowl. Store in the refrigerator and use within 2 weeks. Roasted Garlic Sutter Buttes Olive Oil Company from sutterbuttesoliveoil.com Add the squeeze of lemon. Preheat the oven to 300 degrees. Garlic will have air bubbles coming off the cloves like champagne bubbles.