Heat a wok and put-in the cooking oil.
When the oil becomes hot, put-in the onion and cook for 2 minutes.
Add the bell peppers and white mushrooms then stir. Cook for 2 minutes.
Add salt, pepper, and yellow squash then stir and cook for 3 to 5 minutes.
Put-in the rotini pasta and cook for 2 to 3 minutes.
Pour-in the marinara sauce and mix well. Cook for a minute.
Serve. Share and enjoy!