Step 1: Prepare the Strawberry Filling

1. In a bowl, mix the sliced strawberries, granulated sugar, and lemon juice.
2. Let the mixture sit for about 30 minutes until the strawberries release their juices.
3. Mash some of the strawberries lightly with a fork to create a syrupy filling.

Step 2: Make the Cake Batter

1. Preheat the oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.
2. In a bowl, whisk together the flour, baking powder, and salt. Set aside.
3. In a separate large bowl, beat the butter and sugar until light and fluffy.
4. Add the eggs one at a time, mixing well after each addition.
5. Stir in the vanilla extract.
6. Alternately add the dry ingredients and milk to the butter mixture, beginning and ending with the flour mixture.
7. Mix until just combined.

Step 3: Bake the Cake

1. Divide the batter evenly between the prepared cake pans.
2. Bake for 25–30 minutes or until a toothpick inserted into the center comes out clean.
3. Let the cakes cool in the pans for 10 minutes, then transfer them to a wire rack to cool completely.
4. Step 4: Make the Whipped Cream Frosting
5. In a chilled mixing bowl, beat the heavy cream, powdered sugar, and vanilla extract until stiff peaks form.
6. Be careful not to overbeat, or the cream may turn into butter.

Step 5: Assemble the Cake

1. Place one cake layer on a serving plate.
2. Spread a generous amount of whipped cream over the cake.
3. Spoon half of the strawberry filling over the whipped cream.
4. Place the second cake layer on top and repeat the process.
5. Cover the entire cake with the remaining whipped cream.
6. Garnish with whole or sliced strawberries on top.