I made this last night to take to a religious assembly this weekend - very rich but the lime really tones it down. I think it works well, you can't have too much at once so its gonna last for ages!

395g can of condensed milk
500g white chocolate melts
150g macadamia nuts, chopped
2 limes, zest finely grated

Melt comdensed milk and white chocolate over low heat until smooth and then remove from heat. Add chopped macadamia nuts and lime zest, mixing well. Pour into lined 18cm square tin and refrigerate overnight.

*From the Four Ingredients Cookbook vol. 1*