Cheesy baked Mexican beef and beans

• 2 tbsp olive oil
• 1 red onion , finely chopped
• 2 garlic cloves , finely minced
• 1 green capsicum / bell pepper , cut into 1cm / 1/2" cubes (or other colour)
• 500g/ 1 lb beef mince (ground beef) (Note 1)
• 400g/ 14oz can red kidney beans or black beans , drained (or other beans)
• 1 cup tomato passata (Note 2)
• 1/3 cup pickled sliced jalapeño (Note 3)
• 1 1/2 cups colby cheese , shredded (or other cheese, Note 4)

Mexican spice mix:

• 1 1/2 tsp cumin powder
• 1 1/2 tsp smoked paprika (sub normal paprika)
• 1 tsp garlic powder (sub onion powder)
• 1 tsp onion powder (sub garlic powder)
• 1 tsp dried oregano
• 1/2 tsp cayenne pepper (sub black pepper)
• 1 tsp cooking/kosher salt