Preheat your oven to 350ºF (175ºC).

In a large skillet over medium-high heat, cook the ground beef until fully browned, about 5-7 minutes.

Sprinkle taco seasoning over the beef, stir, and add diced tomatoes and green chiles. Simmer for 5 minutes.

In a bowl, mix shredded cheddar and ranch dressing until creamy. Fold in the taco mixture.

Fill phyllo tart shells with the mixture, then place on a baking sheet.

Bake for 8-10 minutes or until golden and cheese is bubbling.

Allow to cool slightly before serving with salsa or guacamole.