Bbq chicken skewers with spicy plum sauce

Ingredients

• 8 chicken tenderloins, threaded onto metal skewers
• 2 Tbsps olive oil
• 1 medium red onion, diced
• 1 clove garlic, diced
• 1 bird’s eye chilli, (seeded, optional)
• 1 Tbsp grated fresh ginger
• 2 Tbsp tomato paste
• 2 plums, stone removed and quartered
• 1/3 cup white wine
• Sea salt and ground black pepper to taste, Lemon wedge, to serve