Crumble the yeast in a large mixing bowl or dough bowl.

Add buttermilk, sugar, and salt.

Stir the mixture with a hand whisk until the yeast is dissolved.

Add oil, oats, and lentil flour and mix everything well.

Gradually add wheat flour and knead until you have a smooth and flexible dough.

Place a damp tea towel (or use a shower cap) over the bowl.

Let the dough rise for two hours.

Form the dough into approximately 10 buns and place them on a baking sheet lined with baking paper.

Let them rise for about 30 minutes.

Bake the buns for about 10 minutes in a preheated oven at 210 degrees Celsius (410 degrees Fahrenheit) (fan oven).

Let the finished buns cool on a wire rack.