Dice the chicken breast into small, bite-sized pieces and season with half of the sea salt and black pepper.
Heat the extra virgin olive oil in a wide skillet over medium heat and sear the chicken until golden and cooked through, then remove and set aside.
In the same skillet, add the sliced cremini and shiitake mushrooms, sautéing until they release their moisture and become deeply browned.
Stir in the minced shallots and garlic, cooking for 1 minute until fragrant.
Add the arborio rice to the pan, toasting the grains for 2 minutes until the edges are translucent.
Begin adding the chicken bone broth 0.25 cup at a time, stirring constantly and allowing the liquid to be fully absorbed before adding more.
Once the rice is al dente and creamy, fold in the cooked chicken, parmesan cheese, fresh thyme, and remaining salt and pepper.
Serve immediately while the risotto is warm and luscious.