1 medium fennel bulb, finely chopped plus 1 tablespoon chopped fennel fronds
1/2 cup finely chopped red onion
1/3 cup minced fresh cilantro
1 jalapeno pepper, seeded and finely chopped
4 large fresh basil leaves, finely chopped
2 teaspoons rice vinegar
2 teaspoons olive oil
1/4 teaspoon garlic salt
Cut a thin slice from the top and bottom of each orange; stand orange upright on a cutting board. With a knife, cut off peel and outer membrane from orange. Working over a bowl to catch juices, cut along the membrane of each segment to remove fruit. Finely chop oranges; add to bowl with reserved juices.
Add remaining ingredients; toss to coat. Refrigerate, covered, until serving.