Preheat oven to 350°F. Line a cookie sheet with parchment.

Brown beef in a skillet over medium heat (6–8 minutes). Drain and return to pan.

Stir in taco mix and tomatoes with chiles. Simmer 5 minutes. Let cool slightly.

Mix beef, cheddar, and ranch in a large bowl until combined.

Spoon filling into phyllo shells without overfilling.

Bake 8–10 minutes (12–13 if frozen) until golden and bubbly.

Cool 2 minutes and serve warm.