You can make your own dough using the ingredients and let it sit for one hour, or alternatively, use ready-made dough, such as a sheet of puff pastry or pizza dough. Roll the dough out into a rectangle and cut it into 16 squares with a pizza cutter.
Fill each dough square with a mini mozzarella ball, cherry tomato, or hot dog piece, seal the dough, and roll it into a ball.
Spread the balls out on a sheet pan lined with parchment paper, brush the egg yolk wash over the balls, and bake about 14 minutes at 355°F.
Meanwhile, take a piece of cardboard and cut it into two 6 x 14 inch triangles. Cut one of the two triangles along one side so you can put both cardboard triangles into each other. Completely wrap the tower in aluminum foil.
Stick a toothpick in each cooled snack ball and stick them around the tower.
Melt the Swiss cheese and cream in a pan and gently pour the melted cheese over the tower. Garnish the entire snack tower with parsley.