Crab, Pasta and Cheese Gratin

INGREDIENTS

• 3/4 lb. macaroni
• 1 Tbs. olive oil
• 1 cup shelled peas (optional)
• 6 Tbs. (3/4 stick) unsalted butter
• 1/4 cup all-purpose flour
• 2 cups milk, heated
• 1/2 cup heavy cream, heated
• Salt and freshly ground pepper, to taste
• Ground nutmeg, to taste
• 2/3 lb. lump crabmeat, picked over for shell
• fragments
• 3 Tbs. chopped fresh chives
• 1/2 cup finely shredded fontina or Emmentaler
• cheese
• 1/2 cup plus 3 Tbs. grated Parmigiano-
• Reggiano cheese
• 1/2 cup plus 3 Tbs. finely shredded white
• cheddar cheese
• 1/2 cup fine dried bread crumbs