Using a mixer on high speed, beat the heavy cream until stiff peaks are formed. Don't over beat the cream or it will turn to butter! There is no need to clean the beaters before the next step.
In a separate bowl, beat together the cream cheese and sugar until the mixture is smooth and creamy. Fold in the whipped cream and gently mix so that you have a light and fluffy cream cheese mixture.
Spread the cream cheese mixture on four of the slices of bread and sprinkle generously with the raspberries. Press berries down into the cream cheese mixture as much as possible, and spread a bit more cream cheese on the matching pieces of bread. This will seal the sandwich shut when you put them together. If using jam, spread it on the other four slices of bread and skip the top layer of cream cheese. (It's much less messy if you don't spread cream cheese and jam the whole way to the edges.)
Put the bread together to form four cream cheese and fruit/jam sandwiches. Cut the sandwiches in half to make eight triangles, and set aside.
Whisk together the eggs, milk, vanilla, and pumpkin pie spice in a flat-bottomed bowl or pie plate. Set aside.
Melt a little butter (or whatever you like to use) on a griddle or large skillet over medium-high heat.
While the griddle or skillet is heating, allow each sandwich to sit in the egg mixture until it is completely soaked through.
Transfer the soaked sandwich to the hot griddle and cook until browned. Flip it over, and cook until browned on the other side.
Garnish with more fresh berries, a dab of jam, or your favorite syrup.