Preheat oven to 375°F (190°C).
Heat oil in skillet, sauté onion and garlic until soft.
Blend cashews, almond milk, lemon juice, nutritional yeast, garlic powder, onion powder, salt, and pepper until smooth.
In a large bowl, toss zucchini slices with the Alfredo sauce.
Transfer mixture into greased baking dish.
Sprinkle vegan cheese on top like it owes you money.
Bake uncovered for 30 minutes until golden and bubbly.
Let rest 5 minutes—yes, patience.
Garnish with fresh basil and serve with smug satisfaction.
Store leftovers (if any) in an airtight container.