Preheat oven to 400F. Grind up the chicken thighs using the blade attachment on a food processor. Transfer to a large mixing bowl.

Add half of the shredded mozzarella, egg, oregano, pepper, and salt to the mixing bowl.

Mix the chicken crust together until the shredded cheese is well incorporated into the "dough."

Line a pizza pan or large baking sheet. Spread the chicken mixture out in the pan using a spoon. Bake for 25 minutes, or until the crust is cooked through and beginning to brown on top.

Meanwhile, melt the butter in a skillet. Finely dice the celery and cook until wilting and starting to brown.

In a small bowl, combine the sour cream and 2/3 of the hot sauce.

Remove the crust from the oven once finished. Spread the sauce mixture over the base of the crust. Layer with the cooked celery, remaining mozzarella, and blue cheese crumbles.

Bake for another 10 minutes, until the cheese is melted and turning brown. Broil for a few minutes until beginning to crisp, if desired. Remove from the oven, drizzle the remaining hot sauce on top, and garnish with the green onion.