Curried Lentil Soup

INGREDIENTS

• 1 tablespoon fresh lemon juice
• 2 tablespoons (or more) curry powder
• 2 green onions, thinly sliced 1 lemon, cut into 6 wedges
• 1 cup French green lentils
• 1 medium onion, chopped
• 4 1/4 cups (or more) water, divided
• 2 tablespoons (1/4 stick) butter
• 1 medium carrot, finely chopped
• 2 large garlic cloves, chopped, divided
• 1 15- to 16-ounce can chickpeas (garbanzo beans), drained, rinsed
• 3 tablespoons olive oil, divided