Preheat your oven to 275 degrees Fahrenheit. Layout the 12 slices of potato bread in a single layer on a baking sheet.
Bake the bread in the oven for 10 minutes until it becomes dry to the touch.
Preheat your griddle to 350 degrees or a large skillet on medium heat.
In a square baking dish, whisk the 6 eggs, 1 tablespoon granulated white sugar, and ½ teaspoon kosher salt together until smooth.
Add the 1 ½ cups of dairy and 2 teaspoons vanilla extract. Whisk to combine.
Dip each slice of bread into the custard mixture. Times will vary based on the thickness and dryness of your slices. You are looking for the sweet spot of maximum custard absorption without soaking so long that your bread begins to fall apart.
Coat the griddle or skillet with the fat of your choice. (non-stick spray, a 50/50 mixture of butter and neutral oil, or bacon grease)
Place each slice on the electric griddle or pan and top with a sprinkle of cinnamon and nutmeg.
Flip each slice once the bottom has become nice and toasty. This will take about 3 to 4 minutes.
Notes
Tips
Use dry bread, it will soak up more custard.
Mix the custard well. Use room temperature ingredients for your custard and mix them well. You don’t want strings of egg white showing up on your perfectly browned french toast.
Cooking french toast at a lower temperature will allow the center to fully cook without burning the outside.
StorageAllow the french toast to cool to room temperature then store in an airtight container in the refrigerator for 3-5 days.