White beans and leeks

1 leek
small piece of ginger
1 tin of cannellini beans
2 garlic cloves
teaspoon of marjoram
1 green onion

Sweat the leek and ginger in oil, then add a bit of water and let them go soft. Add the beans with their water, minced garlic and marjoram. Turn heat down low and simmer, covered, for 20 minutes. Stir in the chopped green onion and season with salt, pepper and lemon juice.