Slice Lemon & Remove The Peel - Slice the lemon into six slices, about 1/4 inch thick. From here you want to cut off any of the peel and the white pith. This step is important, unless you don't mind a slightly bitter flavor to your broth and quinoa. (I kept it on in the photos to show that it is a lemon). Place the lemon slices in the bottom of a slow cooker. Use three slices per chicken breast (I used 6 slices for 2 chicken breasts).
Season Chicken Breasts - Place chicken breasts over the lemon slices. Season evenly with salt/pepper and Italian seasoning.
Add Garlic, Salt, Broth - Toss 4 garlic cloves of garlic into the slow cooker, 2 cups of chicken broth, and 1/2 tsp of table salt.
Cook & Add Lemon Juice, Tomatoes & Quinoa - Cook on low for 5 hours. About 1.5 hours from serving, mash the garlic cloves with a fork while they are still in the crockpot, and pour in 1 tbsp of lemon juice. Toss in the cherry tomatoes and quinoa. Stir and make sure every piece of quinoa is in the liquid. Place the lid back on and increase the heat to high.
Cook Until Liquid Is Absorbed - Cook until the quinoa absorbs all of the broth, which takes between 1 hour and 1.5 hours. When done, turn off the crockpot, and fluff the quinoa with a fork. Remove the lemon slices (unless you want to eat them or use as a garnish).
Plate - Scoop the quinoa and tomatoes into a bowl and top with the chicken breasts. Sprinkle with parsley, and enjoy!
*This recipe was developed using a rectantular slow cooker, so if you are using. a deeper oval slow cooker, you may need to adjust the cooking time since the chicken will likely be fully submerged in the broth.