Heat the canola oil in a large stockpot over medium-high heat. Add the garlic and saute until golden, about 1 minute. Add the onions, celery, carrots and chipotle and saute until the onions become translucent, 8 minutes. Add the chicken broth, tomatoes, barley, sugar, sea salt and freshly cracked pepper. Lower the heat to simmer and cook for 45 minutes. Spoon into individual bowls and garnish with fresh dill.