Peel and thinly slice 6 onions.
Saute onions in a large skillet over very low heat in a little olive oil until onions reduce in size and caramelize (turn brown and sweet). This takes a long time, more than an hour, so be prepared.
Combine one cup brown rice with 1 1/2 cups water and 1/2 teaspoon salt in a saucepan. Bring to a boil, reduce heat to a simmer and cover. Cook about one hour until done.
Combine one cup lentils in water to cover, bring to a boil. Reduce heat and simmer covered until done (about 30 minutes). Salt to taste after lentils are cooked.
Combine rice and lentils. Top with caramelized onions and serve. Pass sour cream or thick Greek-style yogurt as a topping.