Brownies- Jamie's 30 Minute Meals

This is a Jamie Oliver recipe, from his book Jamie's 30 Minute Meals. He uses some ingredients that I couldn't find at the supermarket, so I substituted clementines with orange zest, pecans and sour dried cherries with macadamia nuts.

Ingredients
2x100g bars of good quality dark chocolate
250g unsalted butter at room temperature
200g caster sugar
6 level tablespoons of cocoa powder
4 heaped tablespoons of self-raising flour
2 tablespoons of crystallized ginger
4 eggs
zest of 1 orange
handful of macadamia nuts

Method:
Smash the chocolate and chop the butter into rough chunks- you can put the chocolate and butter in a water bath to melt completely if you don't have a food processor. When they have both melted and soft, add 200g caster sugar, 6 level tablespoons of cocoa powder, 4 heaped tablespoons of self-raising flour, a pinch of salt and the crystallized ginger. Mix together with a hand held electric whisk. Crack in the eggs and whiz.
Grease a non-stick baking tray (approx. 32x26cm) and drizzle with some olive oil. Use a spatula to spoon and spread the brownie mixture evenly into the tray of about 2.5 cm thickness. Sprinkle over the macadamica nuts. Grate over the zest of the orange. Bake for about 30 mins at 180 deg C.