Heat oil in a pan over medium heat. Cook onions, mushrooms, peppers, broccoli, with a pinch of salt and Worcestershire sauce, stirring occasionally until broccoli softens, about 5 to 6 minutes.
Crack 6 large eggs into a bowl. Add onion salt and pepper. Whisk for at least 30 seconds. Pour eggs into a 8 inch baking dish and top with cooked vegetables adding tomatoes last.
Bake in preheated oven until eggs are set, 10 – 12 minutes. Cool for 5 mins and serve warm.