Step 1Preheat oven to 200°C and line a baking tray with baking paper. Place the capsicum halves on tray, cut side up.
Step 2Place a large non-stick frying pan over medium heat and spray with olive oil. Sauté onion for 2 minutes, or until just softened, then add the beef mince and Mexican chilli powder. Cook, stirring to break up mince, for 2 minutes. Add tomato paste, diced tomatoes and kidney beans and simmer for a further 2 minutes. Add up to 1/4 cup of water to thin if needed.
Step 3Stuff beef mixture into the capsicum halves and top with grated cheese. Cover with a sheet of baking paper and a sheet of foil. Bake for about 10 minutes. Remove foil and paper; bake for a further 10–15 minutes, or until cheese is melted and capsicums are heated through.
Step 4Toss corn with avocado and lime juice to make a salsa. Serve stuffed capsicums, accompanied by salsa and corn chips.