Easy ratatouille with poached eggs

INGREDIENTS

• 1 tbsp olive oil
• 1 large onion , chopped
• 1 red or orange pepper , deseeded and thinly sliced
• 2 garlic cloves , finely chopped
• 1 tbsp chopped rosemary
• 1 aubergine , diced
• 2 courgettes , diced
• 400g can chopped tomatoes
• 1 tsp balsamic vinegar
• 4 large eggs
• handful basil leaves