Preheat over to 350°F (180°C). In a bowl, mix eggs, mayonnaise, green onion, curry powder, salt, pepper and hot pepper sauce. Set aside. Lightly toast pumpernickel bread; cover with half a slice of cheese. Spread egg mixture over cheese. Sprinkle with peppers, mushrooms (if desired) and herbs. Top with remaining half slice of cheese. Bake until melted.