Beetroot falafel

Name: Beetroot falafel
Prep time: 30 min
Cook time: 25 min
Total time: 55 min
Cuisine: Middle Eastern
Ingredients: 1 tbsp olive oil; 2 onions, chopped; 2 tsp ground cumin; 2 x 400g cans chickpeas, drained; 500g raw beetroot, peeled, trimmed and coarsely grated; 100g fresh breadcrumb; 1 egg; 1 tbsp tahini paste; vegetable oil, for brushing or frying; 1 tbsp tahini paste; 2 x 150ml pots natural yogurt; pinch of sugar; flatbreads; few pickled golden beetroot, diced (see 'Goes Well With'); 3 handfuls beet leaves or a bag of beet salad