Make the vinaigrette: Combine the olive oil, mint, lemon juice, honey, Dijon mustard, garlic and salt in a blender or food processor. Blend until smooth.
Toast the nuts and seeds: Heat a dry skillet over medium heat. Add the cashews, almonds, sunflower seeds and sesame seeds and toast, stirring often, until fragrant and lightly browned, 3 to 5 minutes. Remove from the heat.
Assemble the salad: Put the cabbage in a large bowl and add the toasted nuts and seeds.
Dress the salad: Pour the vinaigrette over the cabbage and toss well to coat.
Finish with fresh mint or parsley and serve.
The salad can be made up to 1 day ahead. For the best texture, keep the toasted nuts and seeds separate and add them just before serving.