Soak the chickpeas in lukewarm water the night before. The next day rinse them under cold water.
Cook the chickpeas in a pressure cooker with boiling water, two leeks and one carrot (all of them peeled and chopped). When the chickpeas are tender, strain them and set aside.
In a saucepan, sauté the chopped onion, the chopped garlic clove, the cut tomato and a pinch of stevia in two tablespoons of oil for 20 minutes. Mince and set aside.
In the same saucepan sauté the chopped ham in two tablespoons of oil.
Add the chickpeas with the vegetables, sauté and then add the tomato sauce. Sauté a bit more until all the ingredients are mixed.