A quick and easy recipe that children can make using just a mug and a microwave. Crack two eggs into a microwave-safe mug, add a splash of milk, and whisk until well combined. Stir in some chopped vegetables, cheese, and seasonings of your choice. Microwave the mug for about 1-2 minutes, or until the omelette is set. Carefully remove from the microwave and enjoy this fluffy and delicious omelette in a mug.