Bring a large pot of water to a boil for the pasta.
Heat a large skillet over medium to medium-high heat with EVOO, 3 turns of the pan. Add the peppers, onions, garlic, oregano, chili flakes, salt and pepper, and sauté to soften (do not brown), about 5 minutes. Add stock or water and let it almost cook away; add tomatoes and passata, and stir in basil. Simmer for 30 minutes over low heat.
Cook pasta in salted water to al dente and reserve a half a mug of starchy water before draining.
While pasta cooks add hot peppers and brine to finish sauce; remove pan from heat.
Drain pasta add back to hot pot. Toss pasta with butter, cheese, the reserved starchy water and half of the sauce.
Serve in shallow bowls topped with more sauce and cheese, and finished with a little more torn basil.