Balsamic Vinaigrette for Roasted Acorn Squash Salad

Using a mortar and pestle or the flat side of a chef's knife on a cutting board, mash together garlic and 1/2 teaspoon salt to form a paste.

In a medium bowl, stir together garlic paste, mustard, and balsamic and red-wine vinegars. Add oil in a slow, steady stream, whisking until incorporated. Season with salt and pepper.