Soak beans overnight
Heat oil; add onion, leek, and 1 clove garlic. Sautee until tender.
Drain beans; add to pot, 2 Qts water, remaining garlic, potato, thyme, bay leaf.
Bring to a boil, cover, simmer 1 ½ - 2 hours. Add salt to taste. Remove
bay leaf.
Puree in a blender.
Return to pot, add in the milk. Thin with more milk if needed. Heat,
Add pepper. Add lemon juice, parsley.