Spread cauliflower on a roasting pan, drizzle olive oil on top and season with salt and pepper
Roast in oven for 30 minutes, stirring occasionally, until cauliflower is cooked through and has a nice brown roasted color
Meanwhile, in a medium saucepan, combine 4 cups of cold water and lentils
Bring to a boil, reduce heat, and simmer for 25 minutes until lentils are tender
Drain and set aside
Prepare pasta according to package directions
Drain reserving 1 cup of the pasta cooking water
While the pasta is cooking, in a food processor combine parsley, red onion, olive oil, red wine vinegar, salt and pepper, and pulse until it becomes a smooth green sauce
In a large mixing bowl combine cauliflower, cooked pasta, lentils and green sauce
