Step 1Place the stock in a pan and simmer on a medium-low heat for 15 minutes to reduce the volume by half.
Step 2Preheat the oven to 190 °C/ 375 °F (fan assisted). Chop the eggplants (aubergines) into 2.5 cm (1-inch) chunks. Place on a baking tray, drizzle with 1 tbsp of olive oil and a pinch of salt and roast for 20 minutes until soft and golden.