Baked barley & broad bean casserole
Sweat the onion in a little oil for a few minutes until soft and translucent. Using a slotted spoon, transfer to a large bowl and cool slightly.
Once the onion is cool enough, add 1 tablespoon oil to the bowl together with all the other remaining ingredients. Mix together and leave to stand for 30 minutes.
Preheat the oven to 180°C/350°F/Gas mark 4. Turn the mixture into an oiled casserole dish, and bake for 40 minutes. Serve hot.