Heat the extra virgin olive oil in a wide skillet over medium heat.
Add the diced chicken breast and sliced cremini mushrooms to the skillet, sautéing until the chicken is cooked through and mushrooms are golden brown.
Remove the chicken and mushrooms from the pan and set them aside on a plate.
In the same pan, add the finely diced yellow onion and minced garlic, cooking until translucent and fragrant.
Stir in the arborio rice, toasting the grains for 2 minutes until the edges become slightly 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 the next portion.
Once the rice is tender and the consistency is creamy, stir the cooked chicken, mushrooms, sea salt, black pepper, and fresh thyme back into the pan.
Remove from heat and fold in the grated parmesan cheese until it is completely melted and incorporated.