Dice the chicken breast into bite-sized pieces and season with a pinch of salt and pepper.
Heat the olive oil in a large skillet over medium heat and sauté the chicken until golden brown and cooked through, then remove from the pan and set aside.
In the same skillet, add the minced shallot, garlic, and sliced mushrooms, cooking until the vegetables are soft and the mushrooms have browned.
Stir in the arborio rice and toast the grains for about 2 minutes until the edges become translucent.
Begin adding the chicken bone broth 0.25 cup at a time, stirring constantly and waiting for the liquid to be fully absorbed before adding the next portion.
Once the rice is tender and creamy, stir the cooked chicken back into the pan along with the parmesan cheese, remaining salt, pepper, and fresh thyme.
Serve immediately while the risotto is warm and the texture is velvety.