In a dutch oven over medium high heat, melt butter and brown steak but do not cook through. Use a slotted spoon to remove and put in a bowl and set aside.
Add ground beef and cook until most pink is gone. Use a wooden spoon to break up as it cooks.
Add garlic, onions, and bell peppers and saute 2 to 3 minutes to soften.
Return the steak cubes and juices to the beef mixture. Add tomatoes, worcestershire, spices, and bay leaf. Stir until combined.
Reduce heat to low, cover, and simmer 40 minutes. Stir occasionally to prevent burning.