Heat the olive oil in a large heavy frying pan, add Uncle Ben’s Converted Rice and sauté until the rice is nicely browned (watch it carefully). Put the browned rice into the slow cooker.
Add the other teaspoon of olive oil and the onions and cook until they start to brown, about 4 to 5 minutes. Then add the garlic, Greek seasoning, and dried oregano and cook a couple minutes more.
Add the stock/water mixture and scrape the pan to remove any browned bits; then add the onion/stock mixture to the slow cooker with the rice. Cook on high for 1 1/2 hours.
While the rice cooks, finely chop the bell peppers, slice green onions, and crumble the Feta.
After 1 1/2 hours (or when the rice is fairly softened, but not completely done) add the bell peppers and cook 15 minutes more.
Then add the Feta and sliced olives to the slow cooker and cook another 15 minutes.
Check to be sure the rice is as cooked as you’d like it, then stir in the lemon juice and season with salt and fresh-ground black pepper to taste.
Top with additional crumbled Feta and green onions as desired and serve hot.