Mince garlic and let rest 10 minutes to maximize allicin (anti-inflammatory compound).
Whisk together lemon juice, garlic, olive oil, lemon zest, oregano, salt, and pepper.
Add chicken to marinade — cover and refrigerate 30 min minimum, up to 24 hours.
Preheat the oven to 400°F (200°C).
Arrange marinated chicken in a single layer in a glass baking dish. Pour remaining marinade on top.
Bake 22–28 min until the internal temperature reads 165°F (74°C) on a meat thermometer.
Rest 5 minutes before slicing. Cool completely on a wire rack before sealing in containers.
Divide into 4 airtight glass containers — refrigerate up to 4 days, freeze up to 3 months.