Mother had us take a wide shallow bowl, one large enough to hold a piece of toast. (I don't mean that we put the toast into it yet, though.) We broke one egg into our bowl and beat it up with the Dover egg beater. Then we added the milk, sugar and salt and kept on beating till they were all mixed. [If you don't have an old-fashioned egg beater, a whisk will work, too.]
Then we put the bacon fat into a frying pan over the fire, and let it get steaming hot. Then we turned the fire low under it.
We had already toasted the bread, and now Mother had us dip it into the egg mixture. We took each slice on a fork and dipped it carefully into the egg and then out again right into the hot frying pan. We let the toast get good and brown on the under side. Then we turned each slice over with a fork so that it could get brown on the other side too. In cooking it, we had to turn up the fire a little to make it hotter.
I forgot to say that before we started dipping our toast, we cut it into three-cornered pieces so we each had eight pieces instead of four. [In other words, cut each piece of toast diagonally.] Mother told us not to leave it in the egg mixture very long or it would absorb too much and there wouldnt be enough egg to last. But as we did it, there was plenty.
We helped the French Toast out onto our nice littl blue platters that were piping hot because they'd been standing in a warm place all the time, and there it was, all ready to serve with maple syrup from the big can.
Notes
If you want to use butter, ghee, or oil in place of bacon fat the recipe will still work. It will taste a bit different, however.