Prepare the Ground BeefHeat a large skillet over medium-high heat. Add ground beef, breaking into small pieces while cooking until no pink remains (5-7 minutes). Drain excess fat if using higher-fat beef.
Add AromaticsAdd diced onion and minced garlic to the browned beef. Cook 2-3 minutes until onions soften and become translucent.
Transfer to Slow CookerTransfer beef mixture to your slow cooker. Scrape all caramelized bits from skillet for maximum flavor.
Add Remaining IngredientsAdd bell pepper, beef broth, diced tomatoes with juice, tomato paste, Italian seasoning, paprika, oregano, salt, pepper, and Worcestershire sauce. Stir well.
Set Cooking TimeCover and cook on low for 4-6 hours or high for 2-3 hours. The low setting develops richer flavors if time allows.
Add Frozen VegetablesDuring the final 30 minutes, stir in frozen corn and peas. This timing maintains their color, texture, and flavor.
Final SeasoningOnce cooking completes, taste and adjust seasonings as needed. A touch more salt or Worcestershire sauce can enhance flavors.
Garnish and ServeSprinkle with fresh parsley before serving to add bright color and flavor contrast.