Preheat the oven to 425°F (220°C)
Sift the flour into a mixing bowl, add the salt, and baking powder.
Add the vegan butter and rub it in with your fingers until the entire mix is crumbly. Add in the sugar.
Mix the lemon juice with the soy milk and allow it to curdle into buttermilk. Add it in with the dry ingredients and mix in with a spoon. Add in the vanilla.
Put flour on the surface of the dough. Add more flour as needed and form the dough into a big ball.
Flatten out the ball, cut out 4 cakes and place them on a parchment-lined baking tray.
Brush the top of the shortcakes with soy milk and then place into the oven and bake for 20 minutes until golden brown on top.
While the shortcakes are cooking, slice the strawberries and place them in a large bowl, mix in the sugar, and then place in the refrigerator. Prepare your whipped cream, careful not to shake it. In an electric whisk, add powdered sugar, and whip it.
When the shortcakes are baked, slice them in half and then layer with sweetened strawberries and whipped cream.