First, add olive oil, garlic, salt, black pepper, and lemon zest to a bowl and mix to combine all the ingredients.
Next, add the chicken breasts to a zip-lock bag and pour marinade over the chicken. Let it marinate for at least 20 minutes. Ideally, you can do this overnight.
Preheat the grill to high heat and grill the chicken breasts for 5 to 8 minutes, depending on the thickness. Transfer the chicken to a chopping board and cut to your liking.
Heat a pan over medium heat, add a drizzle of olive oil, minced garlic and sauté for 2 minutes or until soft. Then, add the shredded kale, a pinch of salt, and sauté for 1 to 2 minutes or until slightly soft.
Add the kale to a plate, then the chicken, avocado, mango, and feta cheese. Season with salt, black pepper, balsamic vinegar glaze, and sprinkle some sesame seeds on top to garnish.