Bring 2.5 cups of water to boil. Add 1 cup of rice. Return to boil. Stir and reduce heat to medium low. Cover and cook for 20 minutes.
Chop onion and put in skillet. Add 3/4-1 lb ground beef. Brown the beef with the onion. Drain and rinse, if you prefer.
Return meat/onion mixture to skillet. Set heat to medium-low. Add 1 can of diced tomatoes. Add Italian seasonings, garlic powder, salt and pepper to taste. Cook for about 5-7 minutes to allow flavors to mingle.
Once rice has finished cooking, add to meat/onion/tomato mixture in the skillet. Mix well.
Shred 4-6 oz of sharp cheddar cheese (or other favorite!). Sprinkle over the top of the rice/meat mixture in the skillet. Set to cook on low for about 5 minutes, giving cheese time to melt!
Steam spinach in steamer for 4-5 minutes, until soft and tender.
Serve Rice and Beef Skillet Casserole with side of steamed spinach!