Greek One Tray Chicken

• 2 tbsp garlic infused extra virgin olive oil
• 2 tbsp balsamic vinegar
• 500 g chicken thigh fillets
• 1 cup quinoa
• 350 ml vegetable stock
• 0.5 cup kalamata olives, chopped
• 0.5 cup sun-dried tomato, chopped
• 400 g tin diced tomato
• 0.25 cup slivered almonds
• 100 g feta cheese
• 2 cup baby spinach
• 1 tbsp balsamic glaze to serve (optional)