Step 1Saute garlic and onion over low heat in large saucepan sprayed with nonstick cooking spray until onion is tender and just beginning to brown around edges, 3 to 4 minutes.
Step 2Stir in broth and water. Bring to boil. Add orzo and cook until orzo is tender, about 12 minutes. Reduce heat to low simmer. Stir in cod. Let steep until cod is opaque and fish flakes easily when tested with a fork, 4 to 5 minutes. Season to taste with salt and pepper.
Step 3Combine lemon juice and egg substitute in small bowl. Add about 1 cup broth to egg mixture and stir all into soup. Heat over low heat and stir until soup thickens slightly, 30 seconds to 1 minute. Stir in dill. Garnish with green onions.