Clean, wash and cut the aubergine into large cubes. Peel and finely dice the onion. Knead minced meat, egg yolk, breadcrumbs, onion, some salt, pepper and cinnamon. Form small meatballs (walnut-sized) with moistened hands.
Heat 1 teaspoon of oil in a frying pan and fry the meatballs all around, turning them over, and take them out. Add 1 tablespoon of oil to the cooking fat and fry the eggplant cubes in it. Salt the aubergine, stir in the tomato paste and add the meatballs.
Deglaze with broth and coconut milk. Add red curry paste to taste (very hot), bring to the boil and simmer covered for about 5 minutes. In the meantime, wash the lime thoroughly, grate dry and peel off the peel in fine strips with a julienne nipper.
Halve the lime and squeeze it. Peel garlic and press it through a garlic press. Mix yoghurt, garlic, lime zest, except for a little bit for sprinkling, and about 1 tablespoon lime juice.
Season to taste with salt. Season the minced meat curry with the remaining lime juice and serve in a deep bowl. Add yoghurt. Garnish with mint and lime. Flatbread tastes good with it.