Chorizo is an obvious alternative, or addition, to the eggs but prawns/shrimps also work well with the smoky heat of the sauce. Stir in 350 g/12 oz raw, peeled large prawns/jumbo shrimp into the sauce and cook, stirring occasionally, for 3 minutes until pink and cooked through, then stir in the eggs. Serve topped with coriander/ cilantro and with crusty bread and a green salad.