Judging by the array of salad dressings in the grocery store, you'd think making salad dressing was a complex business. But it's actually extremely simple. In not much more time than it takes to open a bottle, you can create homemade salad dressings that cost a lot less and taste a lot better than commercial ones.
Basic Vinaigrette
Here is my basic vinaigrette salad dressing. You can vary the dressings by changing the type of oil or vinegar used. Substituting all olive oil for the olive/canola mix makes for a richer, more full-flavored dressing. You can substitute red or white vinegars for the balsamic; I like using the herbal vinegars I make using basil, oregano, garlic, chives, sage, rosemary, and/or chili peppers from my garden. Substituting lemon juice for the vinegar makes for a light fresh dressing good on Greek salads.
Lime-Cumin Vinaigrette
This dressing (adapted from Vegetarian Cooking for Everyone, by Deborah Madison) tastes great with a lettuce, avocado, and toasted pine nut salad, or as a dressing for lightly cooked vegetables such as carrots.
Bleu Cheese Dressing
You can make this bleu cheese dressing as rich and thick as you want by choosing which type of dairy product to add.