Step 1: Load the Slow Cooker
Place the chicken breasts, chopped onion, minced garlic, salsa, lime juice, and all the spices directly into the slow cooker. Use a spoon or tongs to mix everything together, making sure the chicken is fully coated with the salsa and spices. This step ensures that every bite of chicken will be flavorful and juicy.

Step 2: Slow Cook the Chicken
Cover the slow cooker with the lid and set it to cook on high for 3 hours or on low for 6 hours. During this time, the chicken will become tender, juicy, and infused with all the rich flavors from the salsa and spices.

Step 3: Shred and Finish Cooking
Once the chicken is fully cooked and tender, use two forks to shred it directly in the slow cooker. Give the shredded chicken a good stir so it soaks up all the flavorful juices. Leave the lid slightly ajar and cook for an additional hour to allow any excess moisture to evaporate.

Step 4: Toast the Tortillas
While the chicken finishes cooking, heat a stovetop griddle or skillet over medium heat. Toast the tortillas for about 20-30 seconds per side until they are warm and slightly browned. You can brush them with a little oil if you like for extra flavor and flexibility.

Step 5: Assemble the Tacos
Spoon the shredded chicken onto the warm tortillas. Top each taco with a dollop of mashed avocado, a spoonful of sour cream, a slice of lime, and a sprinkle of fresh chopped cilantro. Serve immediately while everything is warm and bursting with flavor.