Bring a large pot of water to a boil. Season it with salt and then carefully add in you choice of pasta. Cook as per the directions on the package, or until al dente.
In the bowl of a food processor, combine the lemon juice, olive oil, salt, onion and garlic powders, cubed roasted beets, Greek yogurt, and feta cheese.
Blend all of the ingredients until smooth. Make sure to scrape down the sides intermittently while blending.
Save 1 cup of the pasta water and strain out the rest of the water from the cooked pasta.
Pour the blended beet and feta into the same pot you cooked the pasta in. Add to it about ½ cup of the saved pasta water. Bring to a simmer and stir until the sauce is smooth.
Add the drained pasta to the sauce and gently stir until the pasta is well covered. If the sauce is too thick as it starts to cool down, add a little bit more of the pasta water to adjust.
Serve the pasta while still hot. Garnish with your choice of grated parmesan, feta, chopped pecans, and/or freshly chopped herbs like parsley and cilantro.