Heat oat milk in a pan and let it cool down to at least 30° Celsius. Add a pinch of sugar to the milk.
Dissolve yeast in the sugar oat milk mixture.
Pour dissolved yeast to the flour and add the margarine and cinnamon sugar as well.
Mix and knead using a kitchen machine with dough hook until you got a smooth dough that is elastic and doesn`t stick anymore (approximately 5-10 minutes).
Dust a bowl with flour, put the dough in there, cover with a damp kitchen towel and let rise for 1 up to 2 hours. After that your dough is ready to be processed into whatever you like.