Smoky sardine stuffed peppers

Ingredients

• 1 red pepper, deseeded, cut in half lengthways
• 120g dried brown rice
• 1 teaspoon vegetable oil
• ½ onion, finely chopped
• 1 clove garlic, finely chopped
• ½ teaspoon smoked paprika
• 1 x 227g tin chopped tomatoes
• 100ml reduced-salt vegetable stock
• ½ teaspoon dried oregano
• Freshly ground black pepper
• 1 x 120g tinned fish, eg sardines, in spring water, drained (choose boneless if preferred)