In a large stock pot or Dutch oven, cook ground beef over medium heat until browned and crumbled. Transfer beef to a paper towel–lined plate, and drain grease from pot.
Melt butter in the same pot. Add peppers and onion; sauté 4 minutes until softened. Add garlic and cook 1 minute more.
Stir in diced tomatoes, Worcestershire sauce, brown sugar, and Italian seasoning.
Add 3 cups beef broth and rice. Bring to a medium-high simmer and cook 15 minutes, until rice is tender, adding more broth as needed.
Stir in cooked beef and tomato sauce. Season with salt and pepper. Simmer 5 minutes more.
Serve warm.
Notes
After beefs cooks, transfer it to a paper towel lined plate to drain excess grease.
Start with 3 cups of beef broth. Add extra gradually as needed, jut enough to keep rice and veggies covered while simmering.
Rice will absorb broth as it simmers. Test rice at the 10 minute mark and adjust time from there.