Dice the chicken breast into small bite-sized pieces. Clean and slice the mushrooms, and finely chop the onion and garlic.
In a saucepan, bring the vegetable broth to a gentle simmer and keep warm over low heat.
In a large skillet or heavy pan, heat the olive oil over medium heat. Sauté the chopped onion and garlic until they turn translucent and fragrant.
Add the diced chicken to the pan and cook until lightly browned on all sides.
Stir in the Arborio rice, ensuring each grain is coated with the oil and mixed well with the ingredients.
Pour in a ladle of warm broth and stir continuously until the liquid is mostly absorbed. Continue adding broth gradually, stirring frequently, until the rice becomes creamy and mostly cooked through, about 18-20 minutes.
In the final few minutes of cooking, add the sliced mushrooms and let them soften into the risotto.
Once the risotto is creamy and the rice is al dente, stir in the Parmesan cheese and adjust the seasoning with salt and pepper if desired.
Serve hot, enjoying a savory, creamy mushroom risotto that perfectly balances rich flavors with a satisfying protein boost.