If your soup tastes bland, stir in additional seasoning. Often, just a bit more salt can make a big difference. A teaspoon of apple cider vinegar or a squeeze of orange juice adds a little acidity which can balance out the flavor. Stir in curry powder, nutmeg, ginger, or cinnamon. Add a bit of garlic powder or onion powder. For a southwestern flair, omit the curry and substitute chili powder, cumin, smoked paprika or chipotle chili powder.