Heat the olive oil in a large skillet over medium heat and sauté the diced chicken breast until golden and cooked through; remove from the pan and set aside.
In the same skillet, add the sliced mushrooms, minced shallots, and minced garlic, sautéing until the mushrooms release their moisture and turn a deep brown.
Stir in the dry arborio rice and toast it for 1-2 minutes until the edges are translucent.
Begin adding the chicken broth 0.5 cup at a time, stirring frequently and allowing the rice to absorb the liquid before adding the next ladle.
Continue the process until the rice is tender and has created a natural, creamy sauce.
Fold the cooked chicken, grated parmesan, sea salt, black pepper, and fresh thyme into the risotto.
Serve immediately while the texture is smooth and the flavors are vibrant.