How to Make It
Wash the broccoli rabe thoroughly and remove any yellow leaves. Trim the stems. Using a small sharp knife, peel any thick, tough stems. Rinse and drain. Coarsely chop into 1-inch pieces. Bring 4 1/2 quarts of water to a rolling boil, salt the water and add the broccoli rabe. Cover partially, return to a boil and cook for 1 minute. Drain, reserving 1/2 cup of the cooking water.
In a large, deep, nonreactive skillet, warm the olive oil. Add the sausage meat and cook over moderately low heat, stirring occasionally, until browned, about 10 minutes. Stir in the garlic and crushed red pepper and cook until the garlic is softened, about 3 minutes. Add the broccoli rabe and the reserved cooking water. Cover and cook, stirring occasionally, until the broccoli rabe is tender, 8 to 10 minutes.