Heat the olive oil in a 10-inch nonstick skillet over medium flame. When hot, pour in the egg mixture and turn the heat to low. Cook until set around the edges, about 12 minutes. I rotate the skillet a quarter turn every few minutes. When the eggs are set around the edges, put the skillet in the oven and cook until the center is set; this could take only a minute or 2 with the broiler or quite a bit longer without broiler, perhaps 5 minutes.