Preheat oven to 350. Grease an 8" square baking pan and set aside. Toss diced apples with 1 tsp cinnamon until well coated and set aside. In a large bowl, whisk flour, remaining cinnamon, ginger, baking soda and baking powder together. Add applesauce, sugars, extract and non-dairy milk. Mix until almost combined, then add diced apples. Continue to mix, adding a little extra non-dairy milk if necessary. Pour batter into baking pan and use a spatula to evenly distribute batter. Arrange apple slices over top, a little overlap is okay. Mix 1/2 tsp cinnamon and 1 tbsp sugar together until well combined then sprinkle over top of apples until well coated. Bake 35-50 minutes or until an inserted tooth pick comes out clean.