Preheat the oven to 350 degrees F (set to 325degrees F if using a very dark pan). Grease a 15-inch x 10-inch x 1-inch jelly roll pan with non-stick cooking spray. Cover the pan with parchment paper, and then spray the parchment paper too. Set aside.
Lay a clean tea towel on a flat surface and sprinkle it generously with powdered sugar. Set aside.
In a medium mixing bowl, combine flour, baking powder and salt. Set aside.
In a large mixing bowl, beat the eggs on high for 3 minutes until pale in color. Continue beating as you slowly add in the sugar. Then add the oil, buttermilk, vinegar, and vanilla and beat for 1 more minute. Add in the dry ingredients and mix until just combined.
Pour the cake batter into the prepared pan and tilt to even out the batter. Bake for 12-15 minutes or until it springs back when touched.
When done, immediately invert the cake onto the prepared towel. Remove the pan and parchment paper. Then roll the cake in the towel, starting at the short end, until it's a log. Set on a wire rack and allow to cool completely, about 2 hours.
Filling
Add the heavy cream, powdered sugar, vanilla, and salt to the bowl of a stand mixer with the whisk attachment. Run for 3-4 minutes on medium speed, until stiff peaks form.
Unroll the cake and spread the chantilly cream over the cake, leaving about a 1-inch edge around the sides and top. Roll up the cake into a log again, without the towel this time. *As you roll up the cake, some filling may be displaced/squish toward the edges.
Place the cake seam side down on a serving platter. Chill in the refrigerator for 1 hour before serving.
Dust the top of the cake with powdered sugar for garnish. You can add a dollop of whipped cream and a fresh raspberry on top of each slice, if desired.