Preheat oven to 400. Prepare veggies according to ingredient list and lay on foil lined rimmed sheet pan. Drizzle with olive oil and salt and pepper. Toss to coat.
Roast for 35-40 minutes
While veggies are roasting brown the italian sausage if using and boil & salt water for pasta.
Drain sausage and remove to a plate. Reserve pan for pasta sauce.
Cook pasta until al dente and reserve 1/2 cup pasta water for the sauce.
When veggies are done roasting carefully transfer them and all the liquid from the pan into a blend. Do not add the entire garlic bulb, just squeeze out the cloves. Blend until smooth and pour into pan. Simmer over low heat for 5 minutes. Stir in pasta water.
Whip ricotta and seasonings in blender until smooth and creamy.
Stir pasta and sausage into sauce.
Spread desired amount of ricotta onto a plate and top with pasta. Garnish with parmesan cheese. Enjoy!