Step 1

For the taco filling: In a small bowl, combine the cumin, chili powder, paprika, oregano, and salt.

Step 2

Place the ground turkey in the slow cooker, breaking it up loosely with your hands or a wooden spoon. Add the beans, top with the spice mixture, and pour the salsa or tomatoes over everything.

Step 3

Cover and cook on low for 8 hours, until the meat is tender. Using a wooden spoon, break up the ground turkey and stir until everything is well combined.

Step 4

For the guacamole: In a medium bowl, combine the avocado, tomato, onion or onion powder, garlic powder, lime juice, cilantro, salt, and pepper. Taste and add more salt, lime juice, or cilantro as needed.

Step 5

For the tacos: Warm the tortillas directly over medium flame on the stove, about 20 seconds each side. Place 2 on each plate.

Step 6

Assemble each taco by placing a 1/4 cup of the taco filling on each tortilla. Use a slotted spoon to minimize liquid in the taco. Divide guacamole and lettuce among the tacos. Top each with 1 tbls of the cheddar and sour cream/greek yogurt (if using) and serve.