Start by preparing the ingredients. Dice the onion and mince the garlic.
In the slow cooker, add the olive oil. Place the chicken breasts at the bottom of the pot.
Sprinkle the dried thyme, paprika, salt, and black pepper over the chicken. Add the diced onion and minced garlic on top.
Pour the chicken broth evenly over the chicken and seasonings.
Rinse the long-grain white rice under cold water to remove excess starch. Add the rinsed rice to the slow cooker, ensuring it's submerged in the broth.
Add the frozen peas and carrots mix to the slow cooker, distributing it evenly.
Cover the slow cooker and set it on low heat for 6 hours, or until the chicken is cooked through and the rice is tender.
Once cooking is complete, remove the chicken from the slow cooker and shred it with two forks. Return the shredded chicken to the pot and stir to combine with the rice.
Taste and adjust seasoning if necessary. If desired, garnish with fresh parsley before serving.
Serve warm and enjoy your delicious crockpot chicken and rice!