01 -
Place ground beef or lamb in a Dutch oven or large soup pot over medium-high heat. Cook until fully browned, breaking up the meat continuously, about 8 to 10 minutes. Transfer cooked meat to a paper towel-lined plate, discarding excess fat from the pot.
02 -
Add butter to the same pot, then sauté chopped onion for 5 minutes until translucent. Stir in minced garlic, Italian seasoning, and tomato paste; cook while stirring nearly constantly for 1 minute to develop flavor.
03 -
Add chicken or beef broth, Worcestershire sauce, heavy cream, diced potatoes, and browned meat back into the pot. Increase heat to high and bring to a boil. Reduce heat to maintain a rapid simmer with the lid slightly ajar.
04 -
Cook the mixture until potatoes are tender, approximately 20 minutes, stirring occasionally. Optionally, gently mash the potatoes in the pot to enhance texture.
05 -
In a small bowl, mix cornstarch with 1 tablespoon cold water to create a slurry. Stir the slurry and frozen mixed vegetables into the pot. Return to a boil, then reduce heat and simmer uncovered for 10 to 15 minutes until vegetables are tender, broth slightly thickened, and potatoes reach a soft, fall-apart texture.
06 -
Adjust seasoning by adding seasoning salt and freshly ground black pepper generously, tasting and modifying as needed.