1Remove casings from sausage. In 10- or 12-inch skillet, cook sausage over medium heat about 5 minutes, stirring and breaking up sausage, until no longer pink.
2In medium bowl, beat eggs with whisk until blended. Add to chorizo in skillet; stir. Cook about 4 minutes, stirring constantly, until eggs are scrambled and set.
3Spread butter on toasted slices of bread; place toast on individual plates. Spoon eggs and sausage over toast. Sprinkle with cilantro.