1tspwhole grain mustard(This recipe is just as delicious if you only have one mustard available, but if you have more then throw them in! Each will change the taste in its own subtle way)
Drain the beans and rinse them with cold water and shake the water off in the sieve.
Put them into a bowl/dish and mash them roughly with a fork.
Dice the capers and olives. Combine the olive oil, lemon zest, lemon juice, and the mustards, salt and pepper in a bowl. Peel and crush the garlic and add it with the olives and capers to the bowl.
Finally add the mashed beans and mix well.
If you want the flavours to develop a little stronger leave the mix for a while.