In a small skillet heat 1 tablespoon of avocado oil and sauté onion for 2 minutes. Add spinach and sauté until wilted. Place in a bowl with shredded chicken in a bowl and set aside.
In a small bowl, whisk together mayo, hot sauce, garlic granules, onion powder, parsley, dill, salt.
Add mayo mixture to the chicken mixture and toss to combine. Add in 1/2 cup shredded cheddar cheese.
In a baking dish add chicken mixture. Top with remaining 1/2 cup shredded cheddar cheese.
Bake for 30 minutes until cheese is bubbling. Serve hot.