Oil the inside of a small slow cooker and heat if necessary. Heat the remaining oil in a heavy-based frying pan. Stir in the onions, pepper and chilli. Cook until they begin to soften. Tip into the slow cooker and add the cherry tomatoes and bread and stir everything. Season.
Whisk the eggs with the milk and parsley and pour this over the top, making sure all the other ingredients are covered. Cook for 5-6 hours. Serve with the yogurt.