Method

1. First prepare the cake batter. In a medium-sized bowl, mix the sugar and lemon zest together. Add eggs and whisk until creamy.
2. Incorporate the oil slowly while whisking. Add the plain non-dairy yoghurt and vanilla extract, then mix well.
3. Add in the flour, salt and baking powder. Whisk to combine and set aside to rest.
4. Peel, core and cut the apples into 2cm-thick slices.
5. Get a frying pan on low heat. Add in the butter and let it melt and coat the pan. Add in the sugar and cook until it just dissolves.
6. Remove from heat immediately and arrange the apple slices to cover the base. Sprinkle cinnamon on the apples. Add in the cake batter, ensuring all sides are covered evenly.
7. Cover and cook for 10 – 12 mins on low heat or until a toothpick inserted into the cake comes out clean.
8. Let cool for 5 mins and turn it upside down onto a serving platter. Garnish with chopped walnuts.