Preheat the oven to 350°F (175°C). Grease a 9-inch cake pan and set aside. In a large bowl, whisk together the eggs and sugar until light and fluffy.
In a separate bowl, mix together the flour, salt, baking powder, and shortening until combined. Add the milk and vanilla to the egg-sugar mixture, then slowly add the flour mixture until combined.
Pour the batter into the prepared pan and bake for 30 minutes or until a toothpick inserted into the center comes out clean. Let it cool completely before turning it onto a plate.
For the Strawberry Preserve: In a small saucepan, combine the strawberries, Hennessy, brown sugar, balsamic vinegar, strawberry preserve, jam, and lemon juice over medium heat. Cook until the mixture is bubbly and thickened slightly, about 5 minutes. Spread the strawberry preserve evenly over the top of the cake.
For the Hennessy Whipped Cream: In a medium bowl, beat together the sugar and vanilla until combined. Add in the heavy cream and continue to beat until stiff peaks form.
Finally, fold in the Hennessy and spread over the top of the cake as desired.