Mexican mince bake

Ingredients

• 1 tablespoon olive oil
• 1 red onion, thinly sliced
• 2 corn cobs, kernels removed
• 500 gram pork mince
• 2 zucchini, finely chopped
• 400 gram can diced tomatoes
• 35 gram sachet taco seasoning
• 1 cup chicken stock
• 175 gram packet corn chips
• 1/2 cup grated tasty cheese
• 1/2 cup sour cream
• coriander leaves to serve
• Guacamole
• 1 avocado, seeded, flesh scooped out
• 1 tablespoon lemon juice