In a bowl, beat egg whites until frothy. Add salt and pepper. Mix well and set aside.
In a skillet over medium heat, add olive oil and Spice World Ready-to-Use Minced Garlic. Add red onions and mushrooms and sauté for 5 minutes or until tender. Add spinach and Spice World Global Flavors™ Viva! Italian Herb and cook until leaves are wilted.
Pour egg white mixture over the sautéed vegetables in the skillet. Sprinkle in feta cheese. As soon as the edges start to set, reduce the heat to medium-low. Gently lift the edges of the omelet and tilt the skillet to allow the runny egg whites to flow to the bottom of the pan. When the bottom of the omelet is cooked and the top is no longer runny, flip the omelet.