1. Give priority to light sauces: choose sauces with low calorie and fat, such as red wine vinegar, balsamic vinegar and lemon juice. These sauces are refreshing and appetizing, but they don't add too many calories, so they are very suitable for making vegetable salads.

2. Sweet and sour collocation: Sweet and sour collocation with vegetable salad is a good choice. For example, mixing honey and olive oil with red wine vinegar or white vinegar can reduce acidity without losing sweetness, which is very delicious.

3. Add vanilla seasoning: Add appropriate amount of herbs to the salad dressing, such as rosemary, thyme and sage. These herbs can not only make the sauce taste fresh, but also have certain nutritional value.

4. Mayonnaise: 1-2 Egg yolk is added to vinegar juice or mayonnaise to make mayonnaise. Lecithin in egg yolk can emulsify oil vinegar to make sauce sticky and tender, and the emulsification of egg yolk can increase the smoothness of sauce, which is very popular.

Recommend several skim salad dressings:

1. Olive oil and lemon juice sauce: olive oil, lemon juice, black pepper, salt, refreshing and appetizing, balanced nutrition.

2. Honey vinegar sauce: white vinegar, honey, chopped green onion, vanilla, etc. Moderate sweet and sour, not too greasy.

3. Special salad dressing: made of sage, rosemary, thyme, olive oil, vinegar, etc. Seasoned with vanilla, rich in nutrition and not too high in calories.

4. Mayonnaise: 1-2 egg yolks, prepared with appropriate amount of olive oil, vinegar, salt and sugar. Excellent emulsification effect, smooth but not greasy taste and moderate calorie.

To sum up, choosing light and low-fat salad dressing, sweet and sour with vanilla seasoning, and adding emulsifier such as egg yolk to make sauce can ensure the delicious salad and control the calories to the maximum extent.