This is a simplified slow cooker version of a dish that I first had in college when I spent a semester abroad in Madrid, Spain. I chose a home-stay and was matched with an old-school Madrileña grandmother who once told me that she missed Franco. She was a widow living on a pension and did her all of her own shopping, cooking, and laundry and, because I signed up for it, mine too. Every day that fall, I came home from class during the two-hour siesta to a kitchen steamy with whatever she had bubbling on the stove. Whatever I learned about Spanish home cooking was purely through observation, but when I came back to the States, I found that I missed the sopa de lentejas so much that I've been playing with this recipe for years.
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