Cook your noodles according to package. Drain and set aside.
In a medium sauce pan, heat 1 tablespoon of olive oil. Add garlic, cook until fragrant. 3-5 minutes. Add sweet potato cubes and cauliflower, then cover with broth. (If they aren't fully covered, add a bit of water to do so.)
Bring veggies to a boil, then cover and turn down heat to simmer for 13 minutes.
Once sweet potato and cauliflower are soft when pierced with a fork, use a slotted spoon or spatula to transfer to a blender. IMPORTANT: reserve a cup of the broth you used to cook veggies in.
To the blender with the vegetables, add nutritional yeast, turmeric, dijon, hot sauce, lemon juice, almond milk, one cup of reserved broth, and a generous shake of salt and pepper. Blend until smooth.
Transfer smooth sauce back into your saucepan, then add noodles. Toss until noodles are coated, dish up into bowls! Top with optional green onion, red pepper flakes, or an extra shake of nutritional yeast!