In a food processor, blend cheese and butter. Add the egg, garlic
salt and onion salt; process for 1 minutes or until creamy.
Spread 2 tbsp on each slice of bread. Stack two slices of bread,
cheese side up, for each sandwich; sprinkle with paprika if desired.
Cut each sandwich in half diagonally.
Place on an ungreased baking sheet. Bake at 400 degrees F for 12-15
minutes or until golden and bubbly.