Clean, wash and cut the spring onions into rings. Dice the chorizo roughly and fry them crisply in a pan without fat. Fry the spring onions briefly.
Meanwhile, wash the basil, shake dry, pluck off the leaves and chop. Whisk eggs and basil, season with salt and pepper. Add to the chorizo in the pan and allow to set, stirring occasionally.
Cut the buns in half lengthwise. Spread the scrambled eggs over the lower halves, place other halves of the roll on top.