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 and cooked through, then remove from the pan and set aside.
In the same skillet, add the diced onion and sliced mushrooms, cooking until the mushrooms have released their moisture and turned golden brown.
Add the minced garlic and arborio rice to the skillet, stirring for 1-2 minutes to lightly toast the grains.
Warm the chicken bone broth in a separate small pot or microwave.
Add the warm broth to the rice half a cup at a time, stirring frequently and allowing the liquid to be fully absorbed before adding more.
Continue this process until the rice is tender and creamy, which should take about 18-20 minutes.
Stir the cooked chicken, parmesan cheese, sea salt, black pepper, and fresh thyme into the risotto.
Serve immediately while the texture is velvety and warm.