Lentil Soup with flour

375 g green lentils , soaked for 1 hour salt , to taste fresh ground black pepper , to taste 1 kg spinach 2 onions , cut in half then sliced thinly 4[...]

25 g butter or 25 g margarine 1 onion 1 tablespoon all-purpose flour 2 liters ham stock (you can use cubes) 300 g lentils (red, don't soak them a wash will[...]