orange french toast

orange french toast
4 slices of dry challah (1,5 cm / 0,5” thick)
1 large egg
1 tbsp sugar
70 ml milk
30 ml fresh orange juice
zest of one orange
butter

beat the egg until foamy, add liquids, sugar and zest, mix
soak the challah slices in the mixture, half a minute on both sides
melt the butter in a non-stick frying pan, fry the challah slices for about 2 min on each side, until golden
serve warm, optionally sprinkled with cinnamon and brown sugar