Chickpea soup with chunky gremolata

Name: Chickpea soup with chunky gremolata
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Ingredients: 2 tbsp cold-pressed rapeseed oil; 3 onions , chopped (about 340g); 3 x 400g cans chickpeas , don't drain off the liquid; 3 large cloves garlic , finely grated; 1 red chilli , seeded and chopped; 2 tsp ground coriander; 1 tsp cumin seeds; 4 tsp vegetable bouillon powder; 1 aubergine , finely cubed (350g); 2 tbsp tahini; 210g can chickpeas , drained; 100g cherry tomatoes , cut into quarters; 1 lemon , zested and half juiced; 15g parsley , finely chopped; 3 tbsp chopped mint leaves; smoked paprika , for dusting