To Make Salad:

1. Preheat oven to 350°F (180°C). Coat rimmed baking sheet with cooking spray. Mix oil and maple syrup in a small bowl. Add almonds, and toss to coat; spread over the baking dish, and bake, stirring occasionally, 12 to 18 minutes, or until golden. Let cool completely.
2. Peel oranges, removing the white pith. Cut oranges lengthwise into quarters, then slice crosswise into 1/4-inch pieces.
3. Cut fennel lengthwise into quarters, then crosswise into thin slices.

To Make Dressing:

1. To make the dressing, whisk passion fruit juice, olive oil, dijon mustard, apple cider vinegar, rice vinegar, and chopped onion in a medium bowl; season to taste with salt and pepper if desired.
2. Combine spinach, oranges, fennel, and dressing in a large bowl; toss well. Divide among plates, sprinkle with almonds and serve.