Heat a large dutch oven over high heat. Add the EVOO, 2 turns of the pan, and the lamb; brown the lamb, caramelizing the meat to deep brown. Add lots of black pepper, sea salt, the oregano (or marjoram for a milder taste), garlic, onion, bay leaf, cinnamon stick and chile pepper and cook for 7 to 8 minutes to soften.
Add the tomato paste and olives (or tapenade) and stir for 30 seconds. Add the wine and deglaze the pan; add the milk and reduce the heat to a simmer. Add nutmeg to taste and simmer the ragu while you cook the pasta.
Bring a large pot of water to a boil, salt it, add the pasta and cook until al dente. Drain, reserving 1 cup of the pasta cooking water. Return the pasta to the hot pot with half of the finely crumbled feta. Discard the bay leaf and cinnamon stick. Add the ragu to the ziti and stir, adding in the pasta cooking water as necessary to move the heavy ragu around the pasta. Serve in shallow bowls topped with the remaining feta and the finely chopped parsley and mint.