At the risk of turning this into a religious question. Does the particular religious denomination you practice had a specific food related to funeral or memorial services?

Tell me what it/or they are and what the significance the food plays in the grieving process.

As far as I can tell, food becomes of much needed comfort to the family and guests.
This takes the burden off the family, of having to worry about what to make for supper for others.(And also eating..when most people aren't even hungry though their loss.) It also helps friends of the family to think they are are helping the family and others to cope. (which it truly does!)
Good question!
I will be looking for others' answers to see how they reply to this question.

Growing up in the South we always just cooked some simple dishes and took them to the family.They did't have the gumption or the time to cook. The religious aspect was helping the family and friends in time of need

I am a practicing Orthodox Christian. The traditional memorial dish is called KOLLYVA. It is made of boiled wheat, mixed with sugar and spices. It symbolizes the eternal cycle, people like wheat must be buried to grow and have a new life.

It is made at memorial services nine daysand again forty days after death and again at 6 mothns, 1 year, and the third year anniversary. Also during the year at a time when the church remembers all those who have deceased (ie Saturday of Souls - Psychosavato).

A memorial meal is served to friends and guests after the funeral and again after the 40 day memorial srvice. It is called a MAKARIA. Guests are greeted with brandy, before they sit for the meal. The meal usually includes PAXIMATHIA - a biscotti like but unsweetened cookie. They are dry like bones, so they are traditional. Sweets are condsidered a sign of celebraton so they are not appropriate to serve. Fish (the traditional symbol of Christianity) salad, rice, green beans, cheese, rolls, olives, wine and coffee are the usual menu.

It is also a tradition to honor the name day (the feastday of the saint who the deceased was named for) by making the altar communion bread PROSFORO, or the sweet bread for an ARTOKLASIA service where the names of the deceased are recalled. Or to provide the sweets for the fellowship coffee after the Liturgy.