In a small bowl, use an electric mixer with the whipping attachment to beat together the cream, sugar, and vanilla extract at high speed until stiff peaks form. Transfer the whipped cream into a piping bag with a 1A Wilton tip and set it aside.
Next, cut the fresh croissants in half (from the side), spread strawberry jam as the initial layer, pipe dollops of whipped cream over the jam, and place the tangy strawberries on top of the whipped cream.