Use a spiralizer to spiralize the zucchinis into noodles. Add the noodles to a large serving bowl and set aside.
In a high-powered blender, add the remaining ingredients (except the red pepper flakes) in the order listed. Blend on high until smooth and creamy.
If desired, transfer sauce to a small pan and cook on low until warm, 1-2 minutes. Pour the sauce over the noodles and toss to coat. Garnish with red pepper flakes.