Sauté the Aromatics: In a large pot set over medium heat, warm the butter or olive oil. Add the chopped onions, carrots, and celery, cooking gently until the vegetables soften and become fragrant, about 8 to 10 minutes.
Add the Garlic and Tomato Paste: Incorporate the minced garlic and tomato paste, stirring constantly for approximately 1 minute until the mixture releases its aroma and deepens in color.
Combine the Vegetables and Broth: Add the cubed potatoes, diced tomatoes (including their juices), vegetable broth, Worcestershire sauce, brown sugar, Italian seasoning, seasoned salt, and celery salt. Stir well and bring the mixture to a gentle boil.
Simmer with Orzo: Introduce the dry orzo pasta to the pot, reduce the heat to a low simmer, and cook uncovered for 25 to 30 minutes, or until the orzo is tender and the vegetables have reached desired softness. Stir occasionally to prevent sticking.
Incorporate the Corn and Adjust Seasoning: Within the last five minutes of cooking, stir in the frozen corn. Taste and adjust seasoning with additional salt and black pepper as necessary.
Finish and Serve: Remove from heat and stir in the chopped parsley. For added brightness, incorporate lemon juice or apple cider vinegar, if desired. Serve the soup warm, garnished with freshly grated Parmesan cheese for an elegant finishing touch.