Mix chicken thighs with olive oil, cumin, coriander, turmeric, garlic powder, oregano, cayenne, half the salt, and black pepper. Marinate for 30 minutes.
Blend soaked cashews, water, jalapeño, garlic, lime juice, onion powder, remaining salt, and pepper until smooth. Thin with water if needed.
Season the corn with oil, cumin, chili powder, salt, and pepper. Cook on a grill or skillet until tender and charred.
Cook the chicken for 6 to 8 minutes per side, until it reaches 74°C. Rest for five minutes, then chop.
Combine charred corn, avocado, red onion, cilantro, jalapeño, lime juice, and salt.
Warm the corn tortillas, then fill with sauce, chicken, and corn avocado salsa. Garnish and serve immediately.