Grilled pasta salad can be made with many varieties of vinegar when balsamic vinegar is not available and most often red wine vinegar is used. You can substitute it with apple cider vinegar as in this recipe foodnetwork.com/recipes/patrick-and-gina... which also has mayonnaise instead of olive oil. Another balsamic vinegar alternative is champagne vinegar and you can use this along with olive oil as in this recipe grouprecipes.com/64625/grilled-yellow-sq... If you are looking for how much olive oil to add then check this link recipeland.com/recipe/v/Grilled-Pasta-Sa... which suggests adding ¼ cup for an eight ounce packet of pasta.
When making this salad, the vegetables have to be grilled after they are marinated or brushed with olive oil and garlic. The pasta whether farfalle, penne or macaroni has to be boiled separately and once cooked it has to be mixed together with the grilled vegetables and cheese. flickr.com/photos/fotoosvanrobin/1468923117.
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