Preheat the oven to 200C (400F).
Slice off the leaves of the beets, leaving enough stem to grip on to. Give them a scrub under the tap to get rid of any dirt (you don’t need to dry them). Place them together (if they are small) in a piece of silver foil, or individually wrap them if they’re large. Place them in a roasting pan and bake in the oven for 50-60 minutes, or until tender (check by inserting a sharp knife into the flesh). Take them out of the oven, open up the foil and let them cool. Once cool enough to handle, take a paper towel and rub the skin off (you may want to wear gloves to avoid getting stained!).
Cut the beets into chunks and place into a food processor or blender and process until the mixture is smooth. Add the eggs and yolk and process again until combined.
Pour the mixture into a large bowl and sift in the spelt flour and salt, stirring with a wooden spoon until combined. Transfer the dough to the bench top and knead it gently just until smooth and pliable.** Depending on how wet the mixture is, you may need to add more flour. When working with spelt, you’re looking for a tacky consistency, but not so moist that it sticks to your fingers.
Shape the dough into a ball, flatten it a little so it forms a disc, wrap it lightly in plastic wrap and then put in the fridge to rest for at least 15 minutes.
When ready to make into pasta, divide the dough into 8 pieces.*** You’ll be working with one piece at a time, so cover the remaining pieces either with a damp tea towel, or in plastic wrap.
Take one piece and flatten it using the palm of your hand.
Run this through the pasta roller at its widest setting.
Place the dough horizontally on your work surface, and fold the long ends into the center, so that they meet. Press down on the edges to seal them. At this stage, you should have a roughly rectangular shape.
Run the dough through the pasta roller, open-side first, again at the widest setting.
Repeat the sequence – putting the pasta through the widest setting, then folding the ends and running through again.
Now run the dough through the roller two more times, again on the widest setting, without folding first. This will help to make the dough very smooth and elastic, for stretching.
Now stretch the dough by running through the rollers, each time switching to a narrower setting. After the final setting, you should be able to see the outline of your hand through the dough.
Run the stretched dough through the fettuccine cutters. Gently lay or hang your freshly cut pasta, and cover with a clean cloth so that it doesn’t dry out while you roll and cut the rest of your dough.
Repeat the whole process for the remaining dough.
Bring a large pot of salted water to the boil. NB: While you’re waiting for it to boil, make the sauce (see instructions below).
Once the water has boiled, gently drop in the freshly cut pasta, and cook for about 5 minutes or until just tender.
Drain the pasta, then drop immediately into the butter sauce using tongs, give it a toss so that the pasta is doused in the sauce. Place the pasta on serving plates, add the crumbled blue cheese, then serve immediately.