Sweet potato and red quinoa burgers

Ingredients

• 250 g red quinoa
• 200 g white sweet potato, diced
• 1 small onion, finely chopped
• clove garlic, grated
• 1 tsp dried chilli flakes
• 7 tbsp chickpea flour
• 1 free range egg
• 1 tbsp cajun seasoning
• 1 tbsp cumin seeds
• 2 tbsp sesame seeds
• 2 tbsp olive oil
• 1 bulb fennel, washed and thickly sliced
• 2 medium onions, peeled and cut into wedges
• 2 tsp ginger, diced
• 2 tbsp olive oil
• 2 tbsp muscovado sugar
• 1/2 cup light soya sauce
• 2 free range egg yolks
• 1 tbsp lemon juice
• 1 tbsp dijon mustard
• 2 tsp fresh dill, roughly chopped
• sea salt and freshly ground black pepper, to taste
• 4 cloves garlic, mashed in a mortar and pestle with a pinch of salt
• 1/2 cup extra virgin olive oil
• 4 hamburger rolls