Quick delicious salad. Citrus basically dresses itself. You can serve immediately or refrigerate to let flavors come together before serving.
Slice top and bottom off 1 orange and set on a flat work surface. Cut downwards from the top, following the curve of the fruit, to remove all of the skin and pith. Hold the orange over a bowl to catch juice; cut both sides of each segment away from the connective membrane and transfer to a separate bowl. Repeat with remaining oranges, grapefruit, and tangerine.
Gently toss oranges, grapefruit, tangerine, fennel, and onion together. Add mint, vinegar, and salt; toss gently.
Per Serving: 119 calories; protein 2.6g; carbohydrates 29.4g; fat 0.3g; sodium 322mg.