Seriously Good Vegetable Soup

Bahan-bahan (6 porsi)

• 4 tablespoons extra-virgin olive oil, divided
• 1 medium yellow or white onion, chopped
• 3 carrots, peeled and chopped
• 2 celery stalks, chopped
• 2 cups chopped seasonal vegetables, such as sweet potatoes, green beans, butternut squash, potatoes, bell pepper, zucchini or yellow squash
• 1 teaspoon fine sea salt, divided, to taste
• 6 cloves garlic, pressed or minced
• ½ teaspoon curry powder
• ½ teaspoon dried thyme
• 1 large can (28 ounces) diced tomatoes
• 4 cups (32 ounces) vegetable broth
• 2 cups water
• 2 bay leaves
• ½ teaspoon red pepper flakes, reduce or omit if sensitive to spice
• Freshly ground black pepper, to taste
• 2 cups chopped kale or collard greens or chard (thick ribs removed), or spinach
• 1 tablespoon lemon juice