Dice the chicken breast into small, bite-sized pieces and slice the cremini mushrooms.
Heat the extra virgin olive oil in a wide skillet over medium-high heat.
Add the chicken and mushrooms to the skillet, sautéing until the chicken is golden brown and the mushrooms have released their moisture.
Stir in the diced yellow onion and minced garlic, cooking for 2 to 3 minutes until the onion is translucent and fragrant.
Add the arborio rice to the pan, stirring for 1 minute to lightly toast the grains and coat them in the oil.
Pour in the chicken bone broth 0.25 cup at a time, stirring frequently and allowing the liquid to be fully absorbed before adding the next portion.
Continue simmering and stirring until the rice is tender and the mixture has reached a creamy, velvety consistency.
Stir in the grated parmesan cheese, sea salt, black pepper, and fresh thyme before serving immediately while warm.