To make vegan Parmesan: In small food processor or blender, pulse cashews, nutritional yeast, garlic powder and salt until it resembles grated Parmesan.
Heat grill or grill pan to medium-high heat.
In bowl, stir mayo, ancho chili powder, garlic, lime juice, chipotle powder and salt until smooth.
Place corn on grill or grill pan and cook on all sides until corn is cooked and has grill marks, about 4 minutes per side.
Spread corn with chili mayo then sprinkle with vegan Parmesan and cilantro.