Prepare chicken breast by cutting it into bite-sized cubes and toss them in a mixing bowl. Toss the chicken pieces with olive oil, salt, pepper, garlic powder, and italian seasoning. Once the chicken is coated in oil and spices, heat a wide pan over high heat on your stove. Cook the chicken in the hot pan until the chicken is golden brown to charred on all sides. You can adjust the heat as necessary to make sure your chicken is cooked through.
Leave the chicken aside to cool. In your food processor, pulse together whole basil leaves, parmesan cheese, chopped walnuts, raw garlic, salt, lemon juice, and extra virgin olive oil. You can adjust the seasonings in your pesto sauce to your taste and add more olive oil as needed. Pulse until you have a beautiful green pesto sauce. Feel free to make extra pesto to keep for other recipes at this time!
Add the chicken bites and pesto sauce to a new, large mixing bowl. Add whole ciligiene mozzarella balls and grape tomatoes to the mixing bowl as well. However, if you find the mozzarella and tomatoes too large to your liking, you can cut these ingredients in half. Stir all the ingredients together in your mixing bowl until you have an even, green, saucy pesto mix. Divide the finished recipe amongst meal prep containers and chill in your refrigerator.