In a Dutch oven or similar deep, sturdy pot, heat the extra virgin olive oil over medium high.
Add the ground turkey and yellow onion. With a wooden spoon or spatula, break the meat into small pieces. Cook and stir until it is browned and fully cooked through and the onion is tender, about 7 minutes.
Add the Italian seasoning, ground cumin, kosher salt, ground pepper, and garlic. Stir and cook until the garlic is fragrant, about 1 minute.
Add the frozen chopped spinach. With a fork (or very carefully with your fingers) break apart the clumps so it's fairly evenly distributed with the meat.
Add red bell pepper, green bell pepper, water, fire roasted diced tomatoes, tomato sauce, Worcestershire sauce, and uncooked brown rice. Stir to evenly combine.
Bring the mixture to a boil, then reduce the heat to a simmer. Cover the pot and let cook 30 minutes.
Uncover and stir, scraping up any rice that is beginning to stick. Recover and continue to simmer until the rice is tender, about 10 to 15 additional minutes.
Remove the pot from the heat. Uncover and stir. Taste and adjust the seasoning as desired.
Sprinkle the cheddar cheese and pepper jack cheese over the top, then recover.
Let sit off the heat 10 minutes, until the cheese is melted.
If you’d like the top golden, place the dish, uncovered, under the broiler for a minute or two (watch carefully to ensure the top does not burn).
Serve warm, sprinkled with fresh cilantro or parsley and a dollop of Greek yogurt.