Boil Water: Fill a medium-sized pot halfway with water and bring to a boil.
Cook Sweet Potato: Cut the sweet potato into large cubes. Once water is boiling, place the sweet potato into water and boil until fork tender, approx. 10-15 minutes.
Prep Veggies: Whilst potato is boiling, prepare your veggies and set them aside.
Mash Potato: Drain the potatoes and transfer them to a large mixing bowl. Mash them until mostly smooth with some small lumps remaining.
Add Veggies: To the mashed potato, stir in the diced leek, carrot, spring onions, parsley, garlic powder, hemp seeds, salt, and pepper until well combined.
Add Breadcrumbs: Mix in ⅓ cup of the breadcrumbs. Stir them through until the mixture sticks together and holds it’s shape when formed into round patties. Continue to add in more crumbs until this consistency is reached.
Form Patties: Shape the mixture into burger patties sized to fit your buns. Set them aside on a tray or plate.
Fry Patties: Heat a tablespoon of coconut oil in a large skillet over medium-high heat. Place the formed patties into skillet, cooking in batches if needed, and cook for 2-3 minutes on each side or until dark golden and fully cooked. Repeat with the remaining mixture, adding an extra 1 tablespoon oil when needed to coat the skillet.
Assemble Burgers: Slice the burger buns and spread a generous amount of the vegan mayonnaise dressing on each. Place your fillings into your buns and top with the cooked patty and close the bun.
Serve and Enjoy: Serve the hemp burgers hot with a side of fries or a fresh salad. Enjoy!