Chalwa from Poland's best known candy company - E. Wedel.  The English spelling is Halvah: one of the earliest recorded sweets made from crushed sesame seeds originated in Turkey and dates as far back as 3000 B.C.  Popularized by Polish Jews for centuries it can be found in almost every sweet shop in Poland.  Cut a slice for a snack or spread on bread for a sandwich.
May contain traces of peanuts and other nuts.