Preheat the oven to 450°F / fan 410°F.
In a large bowl, combine the Huel, flour, baking powder and salt. In a separate bowl, mix the oil, maple syrup and oat milk.
Combine both mixtures.
Stir in the seeds and combine until you have a soft dough. Form the dough into a ball and place on a baking sheet.
Bake in the oven for about 20 minutes, or until the bottom of the loaf sounds hollow when tapped.