Place the eggs, half & half, salt and pepper in the blender and mix until very frothy, about 20-30 seconds. Or you can also mix vigorously with a fork, until frothy and light in color.
Heat a 10-inch sauté pan over medium-high heat, when hot, add the butter to the pan, swirling to coat the bottom. Pour the egg mixture into the pan. Using the rubber spatula, stir continuously, scraping the wet eggs to the outside edge of the skillet.
Once the mixture resembles wet scrambled eggs,(about 30-40 seconds), use the spatula to smooth the eggs out evenly across the skillet. Add any additional ingredients at this point. (cheese, veggies etc)
Cook until almost set, about 10-20 seconds more. Use the rubber spatula to fold the omelet in 1/2 or 1/3rds. Then gently slide the omelet out onto a serving plate.
Serve immediately