Line the pie shell with foil and fill with dried beans or a pie weight. Bake until shell is lightly golden along rim and set, about 20 minutes.
Remove foil and weights and cool completely.
In a bowl combine the eggs, cream, chives, parsley and cilantro, seafood seasoning, salt, pepper, and nutmeg, then stir in cheeses, imitation crabmeat and broccoli.
Pour the mixture into prebaked crust and bake until filling puffs and is no longer wobbly in center when quiche is gently shaken, 40 to 50 minutes.
Cool in pie plate for about 10 minutes before trying to cut.