Start by seasoning the chicken breasts with salt, pepper, chili powder, ground cumin, ground coriander, onion powder, garlic powder, paprika, and dried oregano. Drizzle with avocado oil and squeeze the juice of one lime over the top.
If using a slow cooker, place the seasoned chicken in the pot and cook on low for 6-8 hours or high for 3-4 hours until tender. For stovetop, heat a skillet over medium heat, add the chicken and cook until browned on both sides, then cover and simmer until fully cooked through.
Once the chicken is cooked, remove it from the heat and let it cool slightly. Use two forks to shred the chicken into bite-sized pieces.
In a saucepan over medium heat, combine the evaporated milk, diced jalapeños, and both types of shredded cheese. Stir until the cheese is fully melted and the mixture is smooth. Add salt to taste.
On a large baking sheet, spread out the tortilla chips in an even layer. Top with the shredded chicken, drained beans, and pour the cheesy sauce evenly over the top.
Preheat your oven to 350°F (175°C). Bake the loaded nachos for about 10-15 minutes, or until the chips are crispy and the cheese is bubbly.
Once out of the oven, add your desired toppings such as sour cream, sliced jalapeños, diced green onions, sliced black olives, fresh cilantro, diced avocados, and chopped tomatoes.