Baked Turkish eggs with yoghurt and chilli recipe

Ingredients

• 1 small onion, finely chopped
• 1 tin of tomatoes
• 1 tsp ground cumin
• 1 tsp salt
• 1 lemon, juice only
• 1 tbsp olive oil, plus for drizzling
• 1 tsp cayenne pepper
• 200 g natural yoghurt
• 1 garlic clove, crushed
• 6 large eggs
• 50 g unsalted butter
• 1 splash lemon juice