Store Fall Pasta Salad Recipes with Cozy Harvest Flavor in a tightly sealed 2-quart container for up to 4 days at 40°F or colder. Keep extra pecans in a separate dry jar so they stay crisp. Don't freeze the assembled salad because arugula thaws limp and feta becomes grainy. You can freeze the roasted squash alone for 2 months in a flat freezer bag with the air pressed out. For a warm portion, microwave one serving at 50 percent power for 45 to 60 seconds until it reaches about 110°F. Then fold in 1 cup fresh arugula per two servings and add 1 tablespoon dressing. Discard the salad if it smells fermented or feels slimy. Also toss it when the dressing develops separated cloudy pockets after day 4.