SERVES 4 TO 6
¼ cup extra-virgin olive oil
1 pound hot Italian sausage, preferably homemade (here),
casings removed if necessary
1 pound broccoli rabe, trimmed and roughly chopped
2 tablespoons unsalted butter
1 medium onion, finely diced (about 1 cups)
2 medium cloves garlic, minced or grated on a
Microplane (about 2 teaspoons)
½ teaspoon dried oregano
Pinch of red pepper flakes
One 28-ounce can whole tomatoes packed in juice,