Whisk together the orange juice, lemon juice, most of the red onion, olive oil, and salt. Blend until emulsified, taste, and adjust with more salt or lemon juice if needed.

Place the salad greens in a large bowl. Toss very gently with a generous splash of the dressing. Add the tomato, bell pepper, carrot, almonds, and olives. Toss again, and add more dressing if needed.