The photo shows a Turkish sign outside of a sandwich shop that says "Turkey for our future, we eat sandwiches." The joke is that the sign is making a play on words, using the word "tost" (sandwich) to sound like "tost" (roast) in Turkish. This makes it seem as though the sandwich shop is suggesting that people should "roast" Turkey in order to secure its future, which is a nonsensical statement. The humor lies in the unexpected twist, the absurdity of the suggestion, and the use of a double meaning. It's a humorous way to advertise sandwiches and make a lighthearted comment about Turkey.