Green Tomato Soup

Ingredients

• 1 cup water, divided
• 1 bunch green onions (scallions), cut into pieces
• 2 tablespoons extra-virgin olive oil
• 4 1/2 pounds green tomatoes, diced
• 1 tablespoon chicken soup base
• 2 teaspoons salt, or to taste
• 1/2 teaspoon freshly ground black pepper
• 1/2 teaspoon granulated garlic
• 1/2 cup Chardonnay wine
• 1 pint light whipping cream
• 1 cup instant mashed potatoes (such as Idahoan(R) Buttery Homestyle(R))