Shrimp And Spinach Crepe Gateaux

Name: Shrimp And Spinach Crepe Gateaux
Ingredients: 1 c. cold water; 1 c. cold milk; 4 eggs; 1/2 t. salt; 1 1/2 c. flour; 4 T. melted butter; 5 T. flour; 4 T. butter; 2 3/4 c. boiling milk; 1/8 t. nutmeg; 1/4 c. cream; 1 c. grated Swiss cheese + extra for sprinkling over the assembled gateaux; 1 lb. fresh spinach; 2 shallots; 6 large shiitake mushroom caps, diced; salt and pepper; 1 lb. cleaned jumbo shrimp, diced well in a food processor; 1 shallot; 2 T. butter; 1/3 c. sherry; 2 T. tomato paste; 1 egg yolk; 1/2 t. dried oregano