'Zeytinyagli Kerevizli, Portakal Sulu Pirasa' (Leeks with Celery cooked in Orange Juice)

2lbs Leeks sliced into 1" strips
2 Celery Roots (usually potatoes are used in this recipe but with celery this tastes very good) sliced
1 - 2  Carrots sliced
1 whole onion
1 Tablespoon rice
3/4 cup olive oil
1 teaspoon tomato paste
Juice of 2 Oranges
4 Lumps of sugar,  Salt

In a  saucepan layer the carrots, celery, leeks and the whole, peeled onion. Pour the olive oil and add the salt, sugar, tomato paste and the orange juice plus enough water to make 2 cups of water.  Turn the heat on high and when it boils turn it down.  After about 15 minutes add the rice; continue to cook for another 40 minutes.  Let it cool in its own saucepan.  Serve cool.