Chickpea soup with chunky gremolata

Name: Chickpea soup with chunky gremolata
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