Scrub and rinse crabs. Place them in a kettle with little water and salt.
Cover and bring to a boil. Lower heat and simmer for 10 minutes or until the shells turn red.
Drain and let cool. When cool enough to handle, remove crab meat from shell.
Save the top shell (the carapace). In a skillet, saute garlic, onions, and tomatoes.
Add fresh and frozen crab meat, salt, patis, sugar, green pepper, green onions, and raisins.
Season to taste and saute for another 2 minutes. Remove from heat and let cool.
Beat egg whites with salt until they form soft peaks.
Combine eggs with the crab meat mixture and mix very well.
Fill each crab shell with the mixture and coat with bread crumbs then deep fry until golden brown.
Don't coat the shell, only the filling. Serve hot. Good for 6 to 8 persons.