Sprinkle marshmallows evenly into a greased 13 x 8 baking pan; set aside.
In a bowl, combine strawberries and gelatine powder; set aside.
In a mixing bowl, cream shortening and sugar. Add the egg, beating one at a time, beatin well after each addition. Beat in vanilla.
Combine flour, baking powder, and salt; add to creamed mixture alternately with milk.
Pour batter over the marshmallows. Spoon strawberry mixture evenly over batter. Bake at 350 degrees for 45-50 minutes or until toothpick inserted near the middle comes out clean. Cool on wire rack. Cut into squares. Garnish with fresh strawberries and whipped cream.