Preheat your oven to 400°F and roast the diced carrots on a parchment-lined tray for 20 minutes until tender and slightly caramelized.
In a small saucepan, bring the chicken bone broth to a very low simmer and keep it warm throughout the cooking process.
Heat the olive oil in a large skillet over medium heat and sauté the cubed chicken breast until golden and cooked through, then remove and set aside.
In the same skillet, add the diced yellow onion and minced garlic, sautéing until translucent and fragrant.
Add the Arborio rice to the skillet and toast for 2 minutes, stirring constantly to ensure every grain is coated.
Begin adding the warm bone broth one ladle at a time, stirring frequently and waiting until the liquid is fully absorbed before adding the next ladle.
Once the rice is tender and creamy, stir in the roasted carrots, cooked chicken, fresh thyme, sea salt, and black pepper before serving immediately.