Rigatoni alla Norma (Rigatoni with Eggplant)

Ingredients

• • 1 large eggplant
  • 1 teaspoon (5 ml) salt
  • 3/4 lb (375 g) rigatoni
  • 1/3 cup (75 ml) unbleached all-purpose flour
  • Olive oil
  • 1 onion, finely chopped
  • 1 can 28 oz (796 ml) crushed tomatoes
  • 1/4 cup (60 ml) chopped fresh basil
  • 1 1/2 cups (375 ml) crumbled pressed ricotta (see note)
  • Salt and pepper