Grease your slow cooker insert with butter, this makes the clean up a bit easier for you.
Dice the chicken breasts into about 3/4 inch cubes.
Add the rice, chicken, frozen vegetables into slow cooker.
Mix together the soup, broth, half of the Cheddar cheese, and season with salt and pepper as desired.
Pour mixture into the slow cooker. Push down the rice so it is covered with liquid.
Mix together the breadcrumbs and melted butter then mix in the remaining cheese. Spread mixture over the contents of the slow cooker.
Cover the cooker and set to Low setting and cook for 5-6 hours, or High setting and cook for 3 to 4 hours. If using High setting, check the rice, it may require a bit longer to make it fully cooked.
Serve and enjoy with a vegetable side of your choice for a nice meal.