Fully loaded nachos

Ingredients

• 2 corn cobs
• 400g can black beans, drained and rinsed
• Non-stick cooking spray
• 2 cups grated Monterey Jack cheese
• 2 cups grated cheddar cheese
• 350g corn chips
• 1 jalapeno, thinly sliced
• ½ red onion, finely diced
• Handful fresh coriander, roughly chopped
• 2 tomatoes, finely diced
• 1 avocado, roughly chopped
• Lime wedges
• Sour cream