Combine the 3 tablespoons flour, salt, and lemon-pepper seasoning; coat turkey with flour mixture.
In a large skillet cook turkey in 2 tablespoons of the margarine or butter over medium heat for 8 to 10 minutes or until tender and no pink remains, turning once. Transfer turkey to individual plates; cover to keep warm.
Cut any large morels into bite-size strips. For sauce, in the same skillet cook morels, green onion, and garlic in the remaining margarine or butter for 3 to 4 minutes or until tender.
Combine half-and-half and the 1 tablespoon flour; add to vegetables in skillet. Cook and stir until thickened and bubbly; add sherry. Cook and stir for 1 minute more. Season to taste with salt and pepper.
Spoon some of the sauce over turkey; pass remainder when serving. If desired, garnish with fresh herbs. Makes 4 servings.