Hot Crab Dip

3 tsp. margarine
1 small onion, minced
1 tsp. Worcheshire sauce
1 tbsp. sherry (optional)
1 6-ounce can crab, drained
1 6-1/2 ounce can tuna fish, drained
1 large jar cheese wiz
2 drops Tabasco sauce

Melt margarine in large skillet. Add onion and sauté lightly. Add remaining ingredients stirring after each addition. Serve warm in chafing dish with crackers.