Put the milk and sugar into a mug, and microwave for 50 seconds at 500 W.
Cut the bread into pieces.
Beat the egg in a shallow container.
Mix the milk and sugar in the cup. Add the tea bag, cover with a lid (use a plate or something) and leave to steep for 2 to 3 minutes.
Take the tea bag out and shake it a bit. Break it open and take out about 1 teaspoon of the leaves.
Add the leaves to the beaten egg along with the milk and sugar mixture. Soak the bread in this mixture.
When the bread has soaked up as much of the liquid as it can, pan-fry in a frying pan in butter (low-medium heat) until browned.
Flip the pieces over, put on a lid and cook over low heat until browned on the other side.
Transfer to serving plates, sprinkle with granulated sugar, syrup, honey, cinnamon, etc. to taste, and serve.
Story Behind this Recipe
My son loves French toast so I make it a lot. I made some milk tea for him, but he didn't drink it and I didn't want to either, but it was a waste to just throw away. I tried using it to make French toast and it was delicious. So I turned it into a recipe.
The steeping time in Step 3 not only cools the mixture down a bit, it also increases the flavor and fragrance, so don't skip it. Don't try to press more tea out of the teabag; you'll be releasing more bitterness from the leaves.