3/4 c. salad oil
3 tbsp. lime or lemon juice
1/3 c. grated Parmesan cheese
2 tbsp. finely chopped green onion
1/2 tsp. salt
3/4 tsp. dry mustard
1/2 tsp. garlic powder
1/4 tsp. coarse black pepper
1/2 tsp. Worcestershire or soy sauce

Combine ingredients in a covered jar and shake thoroughly; chill. Shake again before using. Makes about 1 1/2 cups. Especially good on Romaine lettuce with croutons.