Makes about a gallon of lovely soup
Heat the oil in a heavy pot. If using Instant Pot, choose "saute." Add the minced garlic, diced onion, and diced carrot. Cook, stirring frequently, until the onions and carrots are softened.
Add the cubes of beef and cook until slightly browned.
Add the canned tomatoes with their juice, the beef broth, and the merlot, plus 3 cups of water. Stir and add the mushrooms and barley.
If cooking on stovetop, cover loosely and let simmer for several hours. If using Instant Pot, close top, close valve, and set to high pressure for 30 minutes.
Before serving, add pepper to taste. Salt if necessary.