Step 1: Preheat your oven to 350°F (175°C) and grease a 9-inch square baking pan with butter or cooking spray.
Step 2: In a large bowl, cream together the softened butter and granulated sugar until light and fluffy.
Step 3: Beat in the egg and then stir in the molasses and freshly grated ginger until well combined.
Step 4: In a separate bowl, whisk together the flour, baking soda, salt, ground ginger, cinnamon, and cloves.
Step 5: Gradually add the dry ingredients to the butter mixture, alternating with the hot water, and whisk until just smooth.
Step 6: Gently fold in the diced apples using a spatula to ensure they are evenly distributed throughout the batter.
Step 7: Pour the batter into the prepared pan and smooth the top with your spatula.
Step 8: Bake for 40 to 45 minutes, or until a toothpick inserted into the center comes out clean.
Step 9: Remove from the oven and let the cake cool in the pan on a wire rack for at least 20 minutes before serving.