Healthy Burrito Bowl

• 2 tbsp extra virgin olive oil
• 300 g chicken breast, cut into pieces
• 1 tsp chilli flakes
• 1 tbsp mexican spice
• 400 g corn, drained
• 1 tomato, chopped
• 400 g black beans, drained
• 0.5 red onion, chopped
• 1 avocado
• 1 handful fresh coriander (optional)