Pierce the sweet potato all over with the tines of a fork. Cook on HIGH in the microwave until tender when pierced with a fork, 2 to 3 minutes per side.
Let the potato cool for several minutes, or until cool enough to handle. Cut in half lengthwise.
Carefully scoop out the flesh of the potato and place in a medium-sized bowl. Reserve the skins.
With the back of a fork, mash the potato flesh until most lumps are gone and stir in ⅛ teaspoon 5-spice powder. Scoop the mashed flesh into the potato skins.
Heat 1 teaspoon of the canola oil in a medium skillet set over medium-high heat.
Add the ginger and cook, stirring, for 1 minute.
Add the ground turkey and cook, breaking up with a wooden spoon, until cooked through. Stir in the remaining ⅛ teaspoon of the 5-spice powder. Transfer the ground turkey to a bowl lined with paper towel.
Heat ½ teaspoon canola oil in the skillet and add the broccoli. Cook until the broccoli is just tender, about 2 minutes.
Add the ground turkey back to the skillet, along with the sauce. Cook until heated, about 1 minute.
Spoon the turkey mixture onto the sweet potatoes. Garnish with sesame seeds.
The Sauce:
In a small bowl, whisk together the hoisin sauce, rice vinegar, soy sauce and sesame oil.