Layered beef enchilada bake

Name: Layered beef enchilada bake
Prep time: 25 min
Cook time: 1 h
Total time: 1 h 25 min
Cuisine: Mexican
Ingredients: 2 tbsp extra virgin olive oil; 1 brown onion, finely chopped; 2 garlic cloves, crushed; 500g beef mince; 1 tsp Mexican chilli powder; 2 tsp ground cumin; 2 x 400g cans chopped tomatoes; 2 cups grated tasty cheese; 420g can red kidney beans, drained, rinsed; 420g can corn kernels, drained, rinsed; 8 Old El Paso flour tortillas, halved; Lime wedges, to serve; 1 avocado, diced; 1/2 cup fresh coriander leaves; 1/2 small red onion, finely chopped; 2 tomatoes, seeded, finely diced; 1 tbsp lime juice