Heat a soup pot over medium to medium-high heat. Add the EVOO, a couple of turns of the pan. Add the speck or bacon and crisp, 2-3 minutes. Add the mushrooms and brown, 6-7 minutes. Add the onion and garlic and cook 5-6 minutes more to soften.
Wilt the greens into the pot and season with a little salt, lots of pepper and some nutmeg. Add the beans, stock and water to the pot and bring up to a boil. Add the pasta, reduce the heat to a low, rolling boil and cook until the pasta is al dente. Check the seasoning, then serve in shallow bowls with some grated Pecorino on top and crusty bread alongside, for mopping.