Mince 3 cloves garlic
Cut chicken breasts into 1-inch pieces.
Whisk together: 1/2 cup fresh orange juice (~2 oranges), 1/4 cup fresh lime juice (~2 limes), 1/4 cup fresh lemon juice (~2 lemons), 3 cloves garlic, 1/4 cup olive oil, 1/3 tsp salt & 1/8tsp ground black pepper.
Place chicken pieces in a large container and pour mojo sauce to coat well. Marinate chicken overnight.
Skewer chicken pieces onto soaked wooden or metal skewers. Grill ~3-4 mins per side until cooked through, 165 F.