Aromatic Foundation Prep: In a large non-reactive bowl, combine minced garlic, chopped rosemary, chopped mint, dried oregano, lemon zest, black pepper, and sea salt. Mash lightly to release aromas.
Craft the Citrus-Herb Infusion: Add olive oil, lemon juice, and red wine vinegar. Whisk ~30 seconds until emulsified.
Marinate: Add chicken and coat well. Cover and refrigerate 1–4 hours. Reserve 2 tbsp marinade before adding chicken if you plan to brush during grilling; discard any used marinade.
Assemble & Preheat: Preheat grill to medium-high (400–450°F / 200–230°C). Thread chicken, onion, bell pepper, zucchini, and cherry tomato in a repeating pattern, leaving small gaps. Lightly oil grates or pan. Makes about 8 skewers; serve ~2 skewers per person (4 servings).
Grill: Cook 12–15 minutes, turning every 3–4 minutes, until chicken reaches 165°F (74°C) and vegetables are tender with light char. For an indoor grill pan: preheat over medium-high, cook 12–15 minutes, turning every 2–3 minutes; work in batches if needed.
Rest & Serve: Transfer to a clean platter, rest 5 minutes. Serve with fresh mint or lemon wedges.