Put 70g of brown rice on to cook according to pack instructions or heat 125g of microwave rice using pack instructions. Meanwhile, heat a heavy-based frying pan with a teaspoon of olive oil and add a small diced yellow pepper, a chopped tomato and quarter of a teaspoon of paprika. Cook gently for 8 minutes until softened, stirring from time to time. Mix in 100ml vegetable or chicken stock, the cooked brown rice, 80g of frozen peas and 150g defrosted frozen prawns. Cook for five minutes, adding a little more stock if necessary to keep mix moist. Serve with a squeeze of lemon juice.