Preheat oven to 400ยบ. Place chicken on a cutting board and make 5 slits in each breast, being careful not to cut through completely. Transfer to a small baking sheet.
In a small bowl, whisk together olive oil, lemon juice, dill, parsley, and garlic. Drizzle over chicken breasts, making sure olive oil mixture gets in the slits. Season with salt and pepper.
Stuff each chicken breast with zucchini, tomatoes, red onion, and lemons. Sprinkle crumbled feta and mozzarella on top.
Bake until chicken is cooked through and no longer pink, about 25 minutes. Garnish with more dill and parsley. Serve warm.
Recipe by The Best Video Recipes for All at https://recipes-for-all.com/greek-stuffed-chicken/