Tenderize the beef round steak with a meat mallet and season with salt and pepper.
Dredge the steak in flour, shaking off the excess.
Heat olive oil in a large skillet over medium-high heat.
Sear the steak for 3-4 minutes on each side until browned.
Remove the steak and set it aside on a plate.
Sauté chopped onions and bell peppers in the same skillet until softened.
Add minced garlic and sauté for an additional minute.
Stir in diced tomatoes, beef broth, and Worcestershire sauce.
Return the steak to the skillet, cover, and simmer for 1 hour, turning occasionally.
Serve warm over mashed potatoes or rice.