Creamy Potato and Cheese Soup

Ingredients

• 1 medium onion, chopped
• 1 celery rib, chopped
• 1 medium carrot, grated
• 1/2 cup butter
• 2 tablespoons all-purpose flour
• 4 cups milk
• 1 can (10-3/4 ounces) condensed cream of mushroom soup, undiluted
• 1/2 cup Velveeta, cubed, or cheddar cheese, shredded
• 6 large potatoes, peeled, diced and cooked (about 8 cups)
• 1 teaspoon seasoned salt