Wash the leeks and chop into ½” to 1” long pieces.
Cut cooked ham in to small cubes.
Chop other veggies and place all in a large pan to saute for 3-5 minutes in oil.
Add cubes of cooked ham and saute together with veggies.
Add 1L of water to the pot.
Add a dash of salt and pepper.
Keep cooking for 40 minutes to 1 hour on low temperature. Cook covered.
Check that veggies are soft. When close to soft texture, combine flour and vegeta in a cup, and add just enough water to melt the flour.
Pour the flour mixture over the cooked veggies and stir.
Continue stirring while waiting for broth to return to boil, approx. another 5 minutes.
If broth appears too thick, add water and alternatively, if it appears to be too runny, add more flour.
Remove from heat and serve.