01 -
Rinse the rice several times to remove excess starch. Bring 2 cups of the chicken broth to a boil, add the rice, and par-cook for 10 minutes. Drain the rice.
02 -
Lightly coat a 5-quart or larger slow cooker with nonstick spray. Add the par-cooked rice, diced carrots, shallot, and Dijon mustard, then stir to combine. Arrange the chicken breasts on top, sprinkle with garlic powder, thyme, kosher salt, and black pepper. Pour in 2 ½ cups chicken broth.
03 -
Cover and cook on HIGH for 1 ½ to 2 hours, until the chicken is cooked through.
04 -
Remove the chicken to a plate and cover to keep warm. Stir the rice, vegetables, and broth in the slow cooker. Re-cover and continue cooking on HIGH for an additional 1 to 1 ½ hours, until the rice is tender. If the rice seems dry, add some of the remaining broth.
05 -
Uncover the slow cooker and stir in the peas and Greek yogurt. Dice the chicken and stir it back into the mixture along with 1/4 cup cheddar cheese.
06 -
Sprinkle the remaining cheddar cheese over the top, cover, and cook for a few minutes on HIGH until the cheese melts. Serve warm with fresh parsley, if desired.