Turkish Stuffed Eggplants - How to make Karniyarik

Ingredients:
• 3 - 4 eggplants (medium to small size), approx. 1 kg
• 1 onion
• 300 g ground beef
• 4-5 green chili
• 2 cloves of garlic
• 2 tomatoes
• ½ cup parsley chopped
• 4 tbsp olive oil
• 1 tbsp chili paste
• 1 tbsp tomato paste
• 1 tsp chili flakes
• 1 tsp salt and 1 tsp black pepper to season