Place peanut oil in skillet over moderate heat. Add onion and saute until slightly limp and transparent. Add crab meat and continue to saute until heated through. Reduce heat.
Beat eggs until well mixed and slightly bubbly. Add ginger, soy sauce, pepper, salt and sherry to beaten eggs. Mix all well and pour into hot crab meat and onion mixture. Cook over low meat, stirring occasionally, until eggs are scrambled.
Remove from heat and serve on heated plates with toast.