Preheat oven to 375 degrees Fahrenheit and grease a baking sheet with a bit of coconut or olive oil.
In a mixing bowl, combine the water with the maple syrup, olive oil, egg, and yeast. Whisk together and let sit a minute.
Stir in the cassava flour and salt to make a smooth dough.
Form the dough into 6 balls. Using wet hands, roll one of the dough balls out into a ⅓" thick rope. Carefully tie it into a knotted pretzel shape. Repeat with the remaining dough balls.
Bring the water and baking soda to a simmer in a medium-sized saucepan. Drop in one of the pretzel twists and let simmer for 30 seconds. Remove with a slotted spoon to the prepared baking sheet. Repeat with remaining pretzel twists.
Whisk the egg yolk with 1 tablespoon of water. Brush the pretzel twists with this mixture and sprinkle with course salt.
Bake for 25 minutes.
Recipe by Create Delicious at https://createdelicious.com/paleo-soft-pretzels-cassava-flour/