Place the string beans, tomato puree, salt, oil and water into a pot over high heat. Bring the mixture to a boil, place a lid on the pot and reduce the heat to medium low. Simmer for 1 hour until the beans are cooked through and the tomato puree has been melted into a sauce. Alternatively, cook the beans in the covered pot in a 350 ̊ preheated oven for 1 hour.

Serve the beans at room temperature. Serve with a fresh squeeze of lemon juice, a generous pinch of aleppo pepper and cilantro.