Toasted Clam Rolls with Cheese

1 loaf thinly sliced white bread
3 cans clams (6-1/2 ounces)
1/3 cup thinly sliced onion
1/2 cup mayonnaise
1 tsp Worcestershire sauce
3/4 tsp garlic powder
1/4 to 1/2 tsp Tabasco sauce
6 tbsp Parmesan cheese
6 tbsp melted butter

Mix all ingredients except bread and butter. Cut crusts off bread and roll each slice until very thin. Spread about 1 tbsp of mixture on bread and roll it up like a jelly roll. Brush with butter, arrange about 1 inch apart on greased cookie sheet. Bake at 425 degrees for approximately 12 minutes, until lightly browned.