Prep the Pasta: Prepare the pasta according to package directions.
Prepare the Vegetables: While the pasta is cooking, chop the zucchini, yellow squash, red pepper, and cherry tomatoes.
Cook the Vegetables: Spray a sauté pan with cooking spray. Add the red pepper, zucchini, and yellow squash. Sprinkle with salt and pepper. Sauté for about 5 minutes over medium heat or until vegetables soften.
Prepare the Pesto Sauce: In a food processor, add the arugula, basil, cashews, olive oil, garlic, salt and pepper. Process until smooth and creamy. Stop a few times to scrape the sides, and the process again until all ingredients are fully incorporated.
Toss It All Together: Drain the pasta, and place it back in the pot. Add the pesto sauce and toss to coat. Add in the sautéd vegetables, and toss again until evenly combined.
Add the Cherry Tomatoes: Cut the cherry tomatoes in half lengthwise. Add to the pasta. Serve warm and enjoy!