Beat the eggs lightly
Add the rest of the custard ingredients and whisk, being careful not to incorporate too many air bubbles
Strain the mix through a strainer fitted with a layer of cheesecloth
Preheat a steamer over high heat
Divide your choice of additions between 4 ramekins before pouring the egg mix over the top.
Place your choice of additions into the bottom of the cups or bowls
Cover the ramekins with aluminum foil and place them in the steamer
Turn the heat down to low immediately and steam on low heat for 10 to 15 minutes if making 4 portions, 15 to 20 minutes if making 2 portions.
Remove the aluminum foil and check for doneness - the top should bounce back when the back of a spoon is pressed very gently on top and clear stock should run after a chopstick is inserted into the center of the custard
The custard is done when the liquid runs clear. The surface of the custard should be slick and moist.
Serve hot or chilled in the cup.