In a large saute pan over medium high heat, add ground beef. Cook and crumble until no longer pink.
Combine cornstarch, taco seasoning and beef broth in a large measuring cup. Pour over ground beef and bring just to a bubble. Reduce heat to medium low and let simmer until thickened.
Fill each tortilla with a about 2 tablespoons of beef mixture. Roll up tightly and spray with cooking spray.
Line out on rack on a parchment paper lined baking sheet. Bake for 15 minutes then turn each and cook another 10 minutes.
Serve with desired garnish (sour cream, salsa, hot sauce, green onions)