Preheat oven to 400 degrees Fahrenheit (200 degrees Celsius). In a baking pan, combine sweet potato cubes with oil, honey or silan, salt, and pepper. Bake in preheated oven for about 15 minutes, until sweet potatoes are soft but not mushy.

Cook broccoli florets in boiling water for about four minutes. Drain broccoli and place in a bowl of ice water to halt cooking process.

Put all vinaigrette ingredients in a container and blend with a hand blender until smooth.

To serve, arrange broccoli florets, sweet potato cubes, and red onion in a bowl. Pour vinaigrette over vegetables and garnish with roasted cashews.