Do we have to serve kosher food? What are some good kosher food options?

The choice is essentially up to you if you want to serve kosher food or not. It is more traditional to serve kosher food and if you are serving food within the synagogue then it must be kosher. There are a lot of kosher restaurants and caterers that serve delicious meal items including: potato kugel, potato knish, salmon, pasta, tabouli, nondairy potato salad, mini burgers, kosher hot dogs, salad, grilled meat, veggie kabobs, sushi rolls, tofu spring rolls, fish tacos, quesadillas, enchiladas, and for dessert you can serve baklava, rugalah, brownies, lemon squares, and fresh fruit.