Bring 2 quarts water to a boil in a large saucepan
. Add salt and beans. Allow beans to re-hydrate by boiling for 15 minutes, skimming off "scum" from surface of water, and allowing it to sit, covered, for 1 hour.
Heat oil in a separate pot, and saute onion
until it begins to turn translucent. Add 6 cups of water to this pot, and then add rice, allowing to simmer
until water is absorbed and rice
is soft, about 20 minutes. Stir okra into pot of rice to warm okra. Gently mix rice and okra
with beans and tomatoes in a bowl and serve.