Preheat the oven to 160C (325 F and line a large loaf tin (21cm x 11cm) with baking paper.
Melt the butter in a small pot and cook for about 4 minutes until it starts to go brown. Pour this into a bowl and allow to cool slightly.
Add the honey, maple syrup, eggs, milk and vanilla to the bowl and whisk until well combined.
Add the flour, baking powder and crumbled halva and whisk until smooth.
Stir through the chopped pears and pecans and then empty the mixture into the lined loaf tin and spread it evenly with a spatula.
Make the crumble by mixing all of the crumble ingredients in a bowl and then spreading this over the surface of the loaf batter.
Bake the loaf for 1 hour and 35 – 45 minutes and until the cake is done. The loaf should be firm to the touch and when a knife is inserted in the middle and it comes out clean. If it is not done continue to bake until it is. Cover the top loosely with a piece of tin foil to prevent over-browning if necessary.