To get the richest flavor, however, the beans need a boost from many other ingredients, like pieces of bacon. The result will ...

Add the butter to the bacon fat and add the onion, celery and white of the leek. Cook gently for 5 minutes then add the beans and stock. Cook for 10 minutes then blend to a smooth puree.

Drain the white beans and put them in a large pan ... In a large saucepan, heat the rapeseed oil over a medium heat. Add the streaky bacon and fry until crisp. Add the onion and garlic to the ...