Apple-Gruyère French Toast With Red Onion

The bread takes on a soft, cakelike texture due to its custard bath, making it distinctly light & fluffy – a nice accompaniment to the sharp cheese, caramelized apple & savory onions. This sandwich may not replaces latkes on Hanukkah, but makes a beautiful alternative appropriate all year long. Ingredients 2 1 3/4-inch-thick slices challah…