Combine milk and water and heat up in the microwave or a saucepan until warm (not hot – you don’t want to kill the yeast!). Add the heated milk and water along with the yeast and sugar to a large mixing bowl and stir to dissolve. Let this sit for 5-10 minutes until it bubbles up – this tells you that your yeast is alive and well!
Measure out your oats and blitz in a food processor until broken down, about 30 seconds.
In a large mixing bowl (use the bowl of a stand mixer if kneading using the machine), combine salt, flax seeds, sunflower seeds, blitzed oats, whole wheat flour, rye flour, and all-purpose flour. Mix well.
Add the vegetable oil to the yeast and milk/water mixture. Then, add the wet ingredients to the dry ingredients. Stir until the dough begins to come together, either by hand or using your stand mixer.
Once the dough starts to come together, knead for about 10 minutes, or until the dough is smooth and elastic. Then, cover with a clean dishtowel or cling film and set aside to rise either overnight in the fridge or for 1 hour at room temperature/until doubled in size or the dough passes the poke test (when dough is poked, it leaves a slight indentation instead of springing back immediately).
Once your dough has doubled in size, shape into 8-10 balls.
Cover and let rise again for 30-40 minutes, or until the dough passes the poke test again. In the meantime, preheat oven to 400 degrees F (205 degrees C).
Once the dough has risen for a second time, egg wash the rolls and top with a sprinkle of sunflower seeds or oats, or whatever other seeds you want!
Bake for 10-15 minutes - check for doneness by looking at the bottom of the rolls and checking the color as well as tapping to the bottom to listen for a hollow sound. Let cool and enjoy!