Preparing the salmon: Empty the contents of the tube of cubed salmon into a bowl.
Mixing the ingredients: In the bowl with the salmon, add the orange and grapefruit segments, mint, lime juice and olive oil. Season with salt and pepper to taste. Gently mix to coat the salmon with all the ingredients.
Serving: Serve the salmon tartare very fresh, accompanied by slices of toasted bagel for a crispy texture. You can also present it with a fennel salad for a touch of freshness.