For an extra layer of flavor, toast the whole wheat rotini in a dry skillet for a few minutes before boiling. This adds a nutty taste to the pasta. Feel free to add other vegetables such as cherry tomatoes, cucumbers, or red onions to customize the salad to your liking. To prevent the avocado from browning, toss it with a little lemon juice before adding it to the salad. This salad can be stored in the refrigerator for up to 2 days. The avocado may brown slightly, but it will still taste delicious. For a non-vegan option, consider adding crumbled feta cheese or grilled chicken to the salad.