If you are looking for a super easy casserole you can make in minutes and use to feed a crowd, this is it. Pesto meatballs and orzo is a combination of three delicious foods: pesto, meatballs, and orzo pasta. Serve it with some toasted garlic bread and a nice green salad tossed with sliced mushrooms and little grape tomatoes for a complete and easy meal. You can add other ingredients to this recipe, like cooked onions or some chopped bell peppers if you'd like.