In a medium saucepan cook zucchini and sweet pepper in hot margarine or butter until crisp-tender. Stir in the flour. Add the milk, green onion, bouquet garni seasoning, salt, and black pepper.
Cook and stir over medium-high heat until thickened and bubbly. Add the cream cheese; cook and stir until cream cheese melts. Stir in the crabmeat and snipped thyme; heat through. Garnish each serving with additional fresh thyme, if desired. Makes 4 main-dish servings.