I saw a similar recipe in a magazine for grilled kielbasa and pierogi with caramelized onions, while I was in a waiting room once. I didn't jot it down, but got inspired by what I saw and made this recipe. It worked out great and so easy! Everyone in my family loves it, and I love having found a new way to serve Bratwurst as well as something creative to do with Pierogi. You can use smoked sausage/keilbasa if you prefer and make this recipe even more quick and easy, We just really like the flavor of the Fresh Brats in this. Hope your family loves it too!