Preheat flat grill or a nonstick skillet over medium-high heat.
Add the vegetable oil, potatoes, diced onion, green pepper, jalapeno pepper, if using, and chorizo. Mix together slightly. Cook for 4 to 8 minutes, flipping once. Add the tomato and eggs. Mix together and cook for another 2 to 3 minutes, flipping over once. Add cheese and cook until slightly melted. Mix hash together to distribute cheese and tomatoes throughout.
Serve with toast or tortillas.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Recipe courtesy of Chris Schwartz, co-owner Franks in Kenosha, WI