High-Quality One-Pot Dish

Do you know those pasta handkerchiefs that are used to cover a dish? Usually, as they say in the West: pasta handkerchiefs 馃槑 are pretty, colorful, and a decoration in themselves. However, sometimes there is a piece of pasta left, and there is no filling left, and the idea for a plain, white, boring handkerchief comes by itself.
Boring until the time, because there are more leftovers, and one of them is a slowly roasted pork tenderloin in rosemary and (! ) the juice after its roasting. After adding broth and sage, the dish is really good. It turns out to be something like a soup, or a main course, but it is eaten so quickly that the naming does not bother anyone 馃檪