Take top sirloin, inspect for silver skin and remove. If the meat has a gristle line running through it, remove it. If the fat feels "hard" in the finger, remove it. Cut into bite-sized pieces; roughly 1/2"-1" - season with salt and pepper. ~1.5 lb top sirloin, Salt and pepper
Grab a large pot and add 1 tbsp of EVOO to the bottom. Heat the pot over a medium heat and add half the beef. Sear on 1 side for ~3-4 minutes, flip and repeat. Remove from heat and do the same for the other beef. Once all the beef is seared, put onto a plate for later.
Add 2 tbsp EVOO to the same pot. Add the frozen veggies, sliced celery stalks and chopped onions. Use a wooden spoon to remove the fond from the bottom of the pot. All these veggies will release lots of water which will help to loosen the fond. Start with a high heat and then taper to a medium-high heat as the water vaporizes. Allow to cook until the veggies have color - this is ~10 minutes. 1.5 cup frozen mixed veggies, 1 large vidalia onion, 3 celery stalks
Once they have color, add dehydrated thyme, dehydrated garlic, and tomato paste. Cook for 30-60 seconds or until fragrant.
1.5 tsp dried thyme, 1.5 tsp dehydrated garlic, 2 tsp tomato paste
Add cooked beef back tot he pot and then add beef and chicken broth, soy sauce, and pearl barley.
8 cups beef broth, 8 cups chicken broth, 1 cup pearl barley, 3 tsp low sodium soy sauce
Follow the cooking instructions for YOUR pearl barley. My pearl barley says to rinse then bring to a boil, then reduce to a simmer and cover for ~35 minutes or until tender. All the pearl barely I've ever cooked has finished in ~35-45 minutes. Once the pearl barley is tender, take off the heat add your 1/2" diced russet potatoes. Allow to rest/stand for 10 minutes - this will allow the potatoes to get tender without going mushy. It will also allow the soup to set up and cool so you can actually eat it.