What is the proper way to roast the egg used on the Seder plate? Happy Passover!

Why is the afikomen taken from the middle matzah during the Seder rather than from the top or bottom matzah?

I work in a Jewish institution which employs a large number of non-Jews. Actually, I am the only Jew in the office. We all share a communal fridge and various snacks. It is assumed that if something is in the fridge it is for everyone's consumption. I brought in a container of peanut butter and leave it in this fridge. Must I take it out for Passover? Wouldn't taking it out be saying that it really is mine, even though I do not feel that way? I do not want to remove it and have people think I do not want them to use it. Although everyone seems respectful, often I overhear colleagues saying things like "that Law is stupid" etc. They are not being hateful, they just do not understand, and I would not want to do something that might incite any form of hatred towards my traditions. My immediate supervisor has a private fridge (he is Christian). Would a solution be to ask him to hold the peanut butter in his fridge for the week? Please advise. Thank you and chag Pesach kosher v'samaich!

Hello- Is one permitted to use a timer to set up a grind and brew coffee machine to have coffee ready for Yom Tov morning? Thank you