Place the chopped onion and garlic at the bottom of the crockpot.
Season the chicken breasts with salt, pepper, and thyme.
Lay the seasoned chicken on top of the onion and garlic.
Rinse the rice thoroughly and spread it over the chicken.
Pour the chicken broth over the rice and chicken.
Add the frozen peas and carrots on top.
Cover the crockpot and set to low for 6-8 hours.
Once cooked, ensure the chicken is fully cooked and rice is tender.
Fluff the rice with a fork before serving.
Garnish with fresh parsley before enjoying.