Line a baking sheet with paper towels. 

In a large sauté pan over medium heat, cook sliced onions in evoo, for 20 to 30 minutes, or until golden brown and crunchy. Take your time with this step; the payoff is crispy, crunchy oniony goodness. 

Transfer crispy onions to prepared baking sheet. Sprinkle with salt; set aside. Serve as a topping for burgers, soups, salads, and our Ultimate Green Bean Casserole.