These tasty mini quiches are quick, easy and great for a snack or lunchbox treat.

1. Preheat oven to 180°C (350°F). Lightly grease a muffin tray.
2. Prepare filling: In a bowl, whisk eggs, Dijon mustard, and self-raising flour until smooth.
3. Mix ingredients: Add chopped red onion, ham, cheese, and fresh thyme into the egg mixture. Stir well.
4. Fill muffin tray: Pour the mixture evenly into the muffin cups, filling about ¾ full.
5. Top with tomato: Place a small slice of tomato on each mini quiche.
6. Bake for 15-20 minutes or until golden and set.
7. Cool slightly before removing from the tray. Serve warm and enjoy!