Turkish one-pan eggs & peppers (Menemen)

INGREDIENTS

• 2 tbsp olive oil
• 2 onions , sliced
• 1 red or green pepper , halved deseeded and sliced
• 1-2 red chillies , deseeded and sliced
• 400g can chopped tomatoes
• 1-2 tsp caster sugar
• 4 eggs
• small bunch parsley , roughly chopped
• 6 tbsp thick, creamy yogurt
• 2 garlic cloves , crushed