Boil a large pot of salted water, add half the box of pasta + cook 10-12 min or until al dente, then drain + return to pot

Meanwhile, dice onion + chop cauliflower into 1-inch pieces; heat 2 tbsp oil in skillet over med-high; cook cauliflower + onions with salt/pep 4-5 min, then add 2 tbsp water, reduce heat, cover + steam 2-3 min until tender

In batches, puree veggies, ½ container of cashew parm + salt/pep until smooth (add 2-4 tbsp water if needed to loosen)

Toss pasta with creamy cauliflower sauce then divide to plates

To loosen sauce, whisk 1 tbsp hot pasta water into every 4 tbsp (¼ cup) sauce