In a large nonstick skillet, cook beef over medium-high heat for 5 to 7 minutes, stirring frequently, until thoroughly cooked; drain fat. Stir in taco seasoning and mix until combined. Set aside in a bowl.
Stir in cottage cheese, chiles, cheese and beef mixture. Bring mixture to a simmer, lower heat to medium low and continue simmering for about 10-15 minutes, stirring occasionally, until mixture thickens slightly.