While the pasta is cooking, add the remaining 1/2 tablespoon of olive oil to the same skillet you cooked the chicken in then add the onion and crushed red pepper flakes. Cook, stirring often, for 2-3 minutes. Add the minced garlic and grape tomatoes then cook, stirring constantly for 1 minute. Add the chicken broth and cook for 3 minutes. Add the broccoli and cook for 3-4 minutes or until the broccoli is just tender. Dice the chicken and add it and their juices back to the pan. Add the cooked & drained rotini pasta, Parmesan cheese, and fresh basil then mix until combined; add any reserved pasta water needed. Season with sea salt and freshly cracked pepper, to taste. Pour into a serving bowl with a little more Parmesan cheese sprinkled on top, if desired. Serve immediately. Enjoy.