Remove any tough outer or damaged leaves of the broccoli rabe. Cut off the stems and tear the leaves into large pieces (about 3 to 4 inches). Wash in a sink filled with cold water. Shake off excess water.
Place broccoli rabe in a deep saucepan with cold water to cover by about 2 inches. Bring just to a simmer over high heat. As soon as bubbles appear at the sides of the pan, remove it from the heat.
Remove 1 cup of cooking water and set aside. Drain the rest.
Heat oil and stir in garlic in a large saute pan over medium heat (don't burn the garlic!). Add the sausages and saute until meat is cooked and loses its raw look.
Salt and pepper to taste, and saute one minute.
Add the rabe water, grape tomatoes and red pepper flakes.
Raise heat and cook until sauce is hot. Once hot, reduce to medium.
Meanwhile, cook orecchiette in rapidly boiling water until al dente.
Drain orecchiette and add to the broccoli rabe and sausage sauce and toss with a wooden spoon.
Remove from heat, add pine nuts and pour into a large serving platter or bowl. Spoon remaining sauce over the top. Sprinkle with Pecorino Romano cheese.