Heat oil in a 10-inch skillet over medium heat. Add chopped onions, carrots, and garlic. Cook for about 3 minutes, stirring occasionally, until softened.
Push the vegetables to the edges of the pan. Add ground turkey to the center and sprinkle taco seasoning over the top.
Break up the turkey with a spatula. Cook, stirring occasionally, for about 3 minutes until browned and cooked through.
Stir in chopped Swiss chard (or other greens). Cook for 1 minute, until the greens start to wilt.
Add Worcestershire sauce and cook for 2½ to 3 minutes more, until the greens are soft and everything is well combined.
Heat tortillas in a skillet or microwave until warm.
Spoon the turkey mixture into the tortillas and serve.
Notes
Prep First: Chop vegetables and measure seasonings before cooking to keep the process smooth and avoid overcooking.
Watch the Turkey: Cook just until it's no longer pink. Overcooking can dry it out.
Moisten if Needed: If the filling seems dry, stir in a splash of water or chicken broth.
Adjust Heat: For spicier tacos, add crushed red pepper flakes or top with sliced jalapeños.
Use Leftovers: Extra filling keeps in the fridge for up to 3 days. Try it in taco salad, taco soup, chili, or on nachos.