Quinoa Burgers with Mushrooms

Ingredients

• 3 tbsp olive oil
• 1 onion, finely chopped
• 2 garlic cloves, crushed
• 75g canned black beans
• 120g cooked quinoa
• 100g cooked sweet potato flesh
• 1 carrot, grated
• ½ tsp ground cumin
• ½ tsp ground coriander
• 2 tbsp freshly chopped parsley
• 15g gluten-free breadcrumbs
• 5 portobello mushrooms

TO SERVE

• A pinch each of sea salt and
• freshly ground black pepper
• 1 avocado, sliced
• 1 large tomato, sliced
• 1 gherkin, chopped
• ½ red onion, sliced
• a handful of fresh coriander
• 1-2 tbsp squeezed lime juice
• a baking sheet lined with baking parchment