Chestnut loaf

Ingredients

• 1 teaspoon olive oil
• 1 medium onion, chopped
• 1 clove garlic, finely diced
• 225g cooked, peeled chestnuts
• 1 x 227g can chopped tomatoes
• 100g wholemeal breadcrumbs
• 1 stick celery, chopped
• 100g mushrooms, chopped
• 2 tablespoons fresh sage, chopped
• Sprig of parsley
• 2 tablespoons tomato relish