Preheat the oven to 160°c. Grease a 22cm round cake pan and line with baking paper.
Place butter, ½ cup honey and sugar in a bowl and stir to combine. Add egg, milk and vanilla, and stir to combine. Fold in flour, cinnamon and grated pear. Spread into prepared pan.
Place sliced pear in a bowl with lemon juice and 2 tbsp honey, and gently toss to combine. Arrange over batter in a fan pattern. Bake for 1 hr 40 minutes or until a skewer inserted in the centre comes out clean.
Brush with extra butter and remaining 35ml honey and scatter with ¼ tsp salt flakes to serve.