Step 1
Place beet into a saucepan; pour in enough water to cover beet by 1 inch. Bring water to a boil and reduce heat to medium-low. Cover and simmer until beet is easily pierced with a fork 25 to 30 minutes. Remove beet to a plate to cool. When cool enough to handle remove and discard peel.
Step 2
Place beet in the bowl of a mini food processor. Add 2 teaspoons olive oil and process until pureed. Measure out 4 tablespoons beat puree and reserve the remainder for another use.
Step 3
Mix together 00 flour and semolina flour on a marble or wooden work surface. Make a well in the center and crack in egg; add 4 tablespoons beet puree salt and remaining 1 teaspoon olive oil. Gently beat egg with a fork incorporating the surrounding flour until batter is runny. Bring remaining flour into the batter using a bench scraper until dough forms a ball. Mix in water 1 tablespoon at a time until dough comes together and has the consistency of play dough; dough should not be sticky.
Step 4
Knead dough with your hands by flattening the ball stretching it and folding the top towards the center. Turn 45 degrees and repeat until dough is soft and smooth about 5 minutes.
Step 5
Shape dough into a ball. Place in a bowl and cover with plastic wrap. Refrigerate until firm about 30 minutes.
Step 6
Divide the dough into 8 sections working with 1 section at a time.
Step 7
Attach the pasta roller to your Kitchen Aid® or use a pasta machine.
Step 8
Use the #6 setting and pass the dough through the roller folding it in on itself 5 times in total. There will be holes in the pasta sheet the first few times which is normal.
Step 9
Change the setting to #3 and put the sheet of pasta through once. Set aside and cover with a slightly damp towel.
Step 9
Remove the roller from the pasta machine and attach the fettuccine cutter. Process each sheet and hang to dry. Allow the pasta to dry slightly this will produce cooked pasta that is slightly al dente.