Pesachim 106b-107a
When is it permitted to wash one's hands before kiddush? • When may one wash with intent to eat bread hours later? • May one make kiddush or havdalah on beer or bread? • May one use tasty beer that causes digestive problems for kiddush? • May one make a blessing over unhealthy foods? • How much of the cup of benediction must be imbibed to discharge one's obligation?