How to Make It
In a food processor, pulse the cilantro, parsley, walnuts and garlic until finely chopped. Add 6 tablespoons of the oil and process until smooth. Season with salt.
In a large pot of boiling salted water, cook the pasta until al dente. Drain the pasta and reserve 1/4 cup of the pasta water.
Meanwhile, in a large skillet, heat the remaining 2 tablespoons of oil. Add the cauliflower and season with salt. Cook over moderately high heat until browned in spots, 5 minutes. Add the bell peppers and cook until tender and brown in spots, 5 minutes. Scrape the vegetables into a bowl.
Add the pasta, pesto and the reserved pasta water to the vegetables; toss until the pasta is coated. Season with salt and pepper. Spoon into warm bowls and serve.
One serving 494 cal, 49 gm carb, 29 gm fat, 3.7 gm sat fat, 12 gm protein, 4 gm fiber.