Rigatoni with Sausage, Spinach and Goat Cheese

Ingredients

• 2 tablespoons olive oil
• 1 medium onion, cut in half lengthwise and thinly sliced crosswise
• 3/4 pound sweet Italian sausage or a combination of sweet and spicy, casings removed
• 3/4 pound rigatoni
• Salt to taste
• 4 ounces spinach, well washed and dried and coarsely chopped (about 2 cups)
• 1/2 pint cherry or grape tomatoes
• 2 tablespoons freshly grated Parmigiano-Reggiano
• 2 tablespoons fresh goat cheese
• 1 tablespoon chopped fresh parsley (optional)