Melt margarine in large skillet. Saute onions and garlic in margarine. Add cream of shrimp soup, clam, white wine. Heat for 5 minutes on low to medium heat. Add tomato and sour cream. Heat for 5 minutes more. Add white pepper to taste. Prepare linguine according to package directions. Drain well and pour sauce mixture over it.
Cajun Country -- New Iberia, Louisiana