What do electric shavers, crock pots, and margarine have in common? They are all, potentially, components of a kosher lifestyle, and therefore the natural subject matter of an eatery business website.
People who keep kosher don’t mix milk (or any dairy products) and meat, which is where the margarine comes in. A steak and potato dinner requires a non-dairy potato topping, so butter is right out.
What about crock pots? Those who keep kosher do not operate ovens or stoves (or light fires) during the Sabbath, so a crock pot allows a hot meal to be served without “operating” the fire (it was turned on Friday morning, before the Sabbath began).
Finally, electric shavers. (Battery-operated will do.) Many Orthodox Jews don’t think it’s kosher to shave with a blade, and so the choice for a man who adheres to this custom is either to grow a beard (quite common) or to shave with an electric shaver. (Although electricity is also verboten on the Sabbath, so that five o’clock shadow look is often visible in synagogue.)