For an extra touch of elegance, dust the finished blintzes with powdered sugar and serve with a dollop of sour cream or crème fraîche. Consider adding a drizzle of maple syrup, chocolate sauce, or a homemade fruit compote for a truly decadent experience. Feel free to substitute the raisins with other dried fruits, such as chopped apricots or cranberries. The blintzes can be made ahead of time and gently reheated in a skillet with butter just before serving.