Place a rack in the middle of the oven and preheat it to 220 °C / 430 °F or preheat the fan-assisted oven to 210 °C / 410 °F. Line a baking sheet with parchment paper.
season the potato
Peel the sweet potato and cut it into larger chunks, approximately 3 cm x 3 cm (1 inch x 1 inch). Season with a teaspoon of a homemade mixture of sea salt, onion powder, dried parsley, pepper, and turmeric (or use BAM Spices, Mr.Potato mixture). Drizzle with olive oil and toss to combine. Arrange the sweet potato in a single layer.
Place in the oven and bake for 30 - 35 minutes at 220 °C / 430 °F (fan-assisted oven 210 °C / 410 °F.) Stir the potatoes once while baking. Drizzle with homemade dressing (next step) during the last five minutes of baking.
Make the dressing. Dice the garlic and add it to a bowl along with olive oil, maple syrup, and balsamic vinegar. Season with salt and stir to combine.
Transfer the baked sweet potatoes to a serving plate. Sprinkle with coriander or parsley and sea salt flakes. Serve as soon as possible.