Preheat oven to 350°F. Line a 9 x 11-inch baking pan with foil/parchment paper and grease; set aside.
In a separate bowl, combine dry ingredients and whisk; set aside.
In a bowl fit with a mixer, cream together shortening and sugar. Add eggs and vanilla extract and beat well.
With the mixer on low speed, slowly alternate between adding dry ingredients and milk.
Pour mixture into greased baking pan and bake for 20-25 minutes.
Cool on wire rack.
Place sliced strawberries and sugar in medium saucepan on medium heat and stir gently until the sugar is dissolved. Take off heat and set aside.
Once the cake is cool, cut the cake into 9 or 12 pieces.
Next, cut each piece in half.
Spread whipped cream in the center of each piece and spoon strawberries over the top. Place top layer of cake on top and spread whipped cream and strawberries over each piece.