Cook the spaghetti squash according to your preferred method. See my tutorial on How to Roast Spaghetti Squash or my Instant Pot Spaghetti Squash. You can do this part up to 5 days in advance if you like to make recipes in parts. Simply store the cooked squash in an airtight container in the refrigerator until you’re ready to use it.

Add the ingredients for the sauce to a small bowl or measuring cup and stir until well-combined.

Heat a large skillet (I use a 12-inch non-stick skillet) over high heat and add the chicken, bell pepper, and garlic. Cook, stirring every 2 to 3 minutes, until the chicken is golden-brown and cooked through.

Pour in the sauce and stir well.

Transfer the cooked spaghetti squash noodles to the skillet along with the chopped basil and green onions and stir well, continuing to heat over high heat. Once everything is combined, you’re done!

If, however, you like the noodles to be caramelized, continue cooking for another 8 to 10 minutes, or until the noodles begin sticking to the pan and begin turning golden-brown and crispy.