2 medium sweet onions (such as Walla Walla or Maui), cut into 1/4-in.-thick wedges
2 pounds grape or small cherry tomatoes, cut in half
1 can (14.5 oz.) hearts of palm, drained and cut into thin disks (optional)
3/4 cup chopped flat-leaf parsley
1/4 cup fresh lime juice
1/2 teaspoon kosher salt
1/2 teaspoon freshly ground black pepper
Put onions in a bowl of cold water and soak for 5 minutes. Drain.
In large bowl, toss tomatoes with onions, hearts of palm, parsley, lime juice, salt, and pepper.
Note: Nutritional analysis is per serving.