Combine the chicken, minced garlic, salt, black pepper, chopped onion, chicken broth, cream of chicken soup, and brown rice in your crockpot. Mix everything well to ensure even distribution.
Cover the crockpot and cook on high heat for about 3 and a half to 4 hours, until the rice has absorbed the chicken broth and is tender.
Mix the shredded cheddar cheese into the hot mixture, then cover and let it sit for 5 to 7 minutes to allow the cheese to melt thoroughly.
Dish out the warm cheesy chicken and rice, then serve and savor your cozy homemade dinner.