Onion and tomato cooked down first, then the beaten eggs stirred into them. This is how eggs are eaten at breakfast in Colombia rather than plain, and the order matters more than anything else. Thirteen minutes, three servings.
The whole difference between huevos pericos and plain scrambled eggs is the order. The onion and tomato go in first and cook down until the tomato has lost its shape, and only then do the eggs go in. Put them in together and you get watery eggs with raw tomato in them. Take the pan off the heat a little before the eggs look done: there is enough heat left in the pan and the eggs to finish them, and pericos left too long go dry. The tomato can be chopped or grated. Grated melts into the onion faster and leaves no skin behind.