Rustic Crab Quiche

Name: Rustic Crab Quiche
Ingredients: 1 9-inch pie pastry; 1 tablespoon olive oil; 1 medium onion, chopped; 4 extra large eggs; 1 cup half and half; 1/2 teaspoon kosher salt; 1/4 teaspoon black pepper; 1/4-1/2 teaspoons cayenne pepper (less if you don't like spice, more if you do); 1 pound crab meat (preferably lump); 1 1/4 cups shredded gruyere cheese, divided; 2 tablespoons fresh chopped parsley; 2 tablespoons parmesan cheese