01 -
Preheat your oven to 350°F (175°C) and lightly grease a 9x13-inch baking dish.
02 -
Cook the spaghetti according to the package directions until al dente. Drain well.
03 -
In a large bowl, combine the cooked chicken, cream of chicken soup, sour cream, spinach, 1 cup of the Monterey Jack cheese, minced garlic, and half of the French Fried Onions. Stir until well mixed.
04 -
Add the cooked spaghetti to the chicken mixture and gently stir to combine.
05 -
Pour the mixture into the prepared baking dish and spread it evenly.
06 -
Sprinkle the remaining Monterey Jack cheese and French Fried Onions over the top.
07 -
Bake uncovered for 40-50 minutes until hot, bubbly, and the onions are golden brown and crispy.