Onion and Mushroom Burgers

These burgers use whole vegetables and so make a nice change from the mashed up vegetable burgers which you generally see.

Ingredients:

• 2 large red onions, peeled and cut in half
• 4 large mushrooms, washed
• 4 tsp olive oil
• salt and pepper to taste
• 4 burger baps

Method:

1. Preheat the oven to 200 degrees.
2. Remove the center core of the onions so that they can fit over the stalks of the mushrooms.
3. Place the mushrooms and onion stacks on a baking tray.
4. Pour a tsp of olive oil over each one and season with salt and pepper.
5. Roast in the oven for 30 to 40 minutes or until the onion is nicely caramelised. 
6. Serve inside the baps, possibly with some relish or ketchup.