To prepare a tex mex burger with cajun mayo, you'll need: 1 pound ground beef 2 tablespoons mayonnaise 1 teaspoon cayenne pepper 2 teaspoons paprika Instructions: Preheat the oven to 375 degrees F (190 degrees C) and grease 2 x 8-inch baking pans with nonstick cooking spray. Heat the oil in the pan over medium-high heat. Add the beef and cook until browned on all sides, about 5 minutes. Remove from the heat and set aside. In the same pan, add the onion, celery, bell pepper, and garlic. Cook, stirring frequently, until the onions are soft and translucent, 3 to 4 minutes, or until softened, 2 to 3 minutes more. Transfer the meat to the prepared pan and let it rest for 5 to 10 minutes before slicing.