In a large bowl, stir together the dill weed, parsley, garlic powder, onion powder, salt, and pepper.
Lay the cauliflower in a single layer on a rimmed baking sheet. Drizzle with the oil, then sprinkle with the ranch seasoning, tossing to coat.
Roast until cauliflower is tender and golden brown, about 20 minutes. Turn off the oven. Sprinkle with the shredded cheese and return to the oven for 5 minutes or so, until melted and bubbly.
Notes
Storage Information: You can store leftovers in an airtight container in the refrigerator for up to 3 days. Rewarm gently in the oven or microwave.