Preheat Dutch oven or large stock pot on medium heat on the stove-top and swirl oil to coat the bottom of the pot.
Brown onion in the oil.
Add garlic, oregano, thyme, and salt, and pepper.
Add cabbage and cook for 10 minutes to soften/make room in the pot and brown a bit.
Add vegemite, tomatoes, broth, lentils, and rice and stir to evenly distribute.
Bring the whole pot to a boil and then reduce heat to low/medium-low, cover and cook for 75 minutes. Do not open while the rice/lentils are cooking!
Test the rice/lentils for your desired doneness (after the full 75 minutes) and if they still need more moisture/time, add another 1/4 cup of water, stir, cover, and cook 10 more minutes.
Serve topped with a good dollop of sour cream and herbs.