01 - Preheat oven to 350°F. Grease and line two 8-inch round cake pans with parchment paper.
02 - In a large bowl, whisk together the flour, baking powder, baking soda, salt, cocoa powder, and sugar until evenly blended.
03 - Add the eggs, vegetable oil, whole milk, and vanilla extract to the dry mixture. Beat until the batter is smooth and free of lumps.
04 - Gradually pour in the hot water while mixing on low speed until fully incorporated. The batter will be thin — this is normal.
05 - Divide the batter evenly between the two prepared cake pans. Bake for 30 to 35 minutes, or until a toothpick inserted into the center of each layer comes out clean.
06 - Allow the cakes to cool in their pans for 10 minutes, then transfer them to wire racks to cool completely before assembling.
07 - Combine the sliced strawberries, granulated sugar, and lemon juice in a small bowl. Let the mixture rest for 15 minutes, stirring occasionally, until the strawberries release their natural juices.
08 - Place the chopped semisweet chocolate in a heatproof bowl. Heat the heavy cream in a small saucepan until it just begins to boil, then immediately pour it over the chocolate. Let it sit for 3 minutes, then stir until completely smooth. Allow the ganache to cool until thickened but still spreadable.
09 - Place one cooled cake layer on a serving plate. Spread a thin, even layer of ganache over the top, then arrange the macerated strawberry slices in a single layer over the ganache.
10 - Place the second cake layer on top. Spread the remaining ganache evenly over the top and sides of the cake. Garnish with whole or halved strawberries and chocolate shavings if desired.
11 - Refrigerate the assembled cake for at least 30 minutes before slicing to allow the ganache to set and ensure clean portions.