Place the chicken, breast-side down, on a cutting board. Cut along both sides of the backbone from end to end with kitchen shears and remove the backbone.
1 whole chicken
Flip the chicken breast side up, and open it like a book. Press firmly on the breasts with your palm to flatten them.
Use a knife to make several cuts into the chicken meat.
In a bowl, combine the garlic, oregano, paprika, chili flakes, lemon juice, and olive oil; season with salt and pepper to taste.
6 garlic cloves, 2 tbsp. dried oregano, 2 tbsp. paprika, ½ tsp. dried chili flakes, ⅓ cup fresh lemon juice, ¼ cup olive oil, Sea salt and freshly ground black pepper
Place the chicken in a marinating container and pour the spice mixture over the chicken.
Cover and refrigerate for 4 to 12 hours.
Heat the grill to medium heat.
Grill chicken, breast side down, for 10 to 15 minutes.
Flip the chicken and cook an additional 30 to 45 minutes, or until the chicken is cooked through.
Let the chicken rest for about 5 minutes before carving.