To cook chicken and veggies: Pre-Heat oven to 450F. chicken and veggies on a large sheet pan to create a rainbow pattern. In a small bowl, combine all the ingredients for the marinade. Brush mixture onto chicken and veggies or toss chicken and veggies in mixture. Bake for 15-20 minutes or until veggies are charred and chicken is tender.
To make Tzatziki: Whisk all the ingredients for the tzatziki in a small bowl. Divide mixture into 4 (4 oz) portion size containers or into any small containers with lids or into snack size ziplock bags. covered in place in the fridge.
To assemble: Place 1/2 cup of brown rice into each meal prep bowl. Divide chicken and veggies mixture into the 4 meal-prep bowls. Cut 2 whole wheat pitas into 8 slices each. Place 4 slices of pita into each bowl. Cover and refrigerate for 4-5 days. To re-heat, Remove pita and heat chicken and veggies for 2-3 minutes in the microwave. Pour cold tzatziki on chicken and enjoy!