1. In large Dutch oven, bring 2 cups water and poaching liquid ingredients to a boil. Reduce heat to low and simmer 45 minutes. Strain liquid into large skillet and discard solids. Continue simmering liquid until reduced to 1 1/2 cups.
2. Place cod, leeks, bell pepper and tomato in liquid; bring to a simmer. Cover and poach 5-6 minutes, or until cooked through.
3. To serve, divide liquid and vegetables equally among 4 bowls. Cut cod into large pieces and divide equally among bowls.