Preheat the oven to 425 degrees F / 220ºc. Peel and chop the sweet potatoes.
Place in a very large bowl or zip lock. Add the starch, cover the bowl with a plate and dance away. Or shake the ziplock or use spoons to mix..
Once the sweet potatoes are evenly coated, add oil, herbs and spices through salt and mix well.
Spread the sweet potato sticks evenly in one layer on 1 or 2 baking sheets.
Bake at 425 degrees F / 220ºc for 18 to 22 minutes. the sweet potatoes should be cooked through and start to get brown edges and spots. Broil for half to 1 minute to brown. Let the fries sit for 2 minutes on the sheet before transferring to a serving bowl or plate. Season with salt, black pepper and powdered nutritional yeast and serve while still warm hot. the fries get softer when they cool.
Serve with chipotle ranch, plain ranch or dip of choice or ketchup.
For the chipotle ranch:
Blend everything, taste and adjust salt, spice and ranch seasoning.
Or mix some chipotle pepper powder in vegan mayo of choice for chipotle mayo dip. Add ranch seasoning if needed.