Making Monterey Chicken Spaghetti is simple if you follow these easy steps:

1. Cook the Spaghetti: Begin by boiling water in a large pot. Add a pinch of salt and cook the spaghetti according to package instructions until al dente. Drain and set aside.
2. Prepare the Chicken: While the spaghetti cooks, season the chicken breasts with garlic powder, onion powder, paprika, salt, and pepper.
3. Sear the Chicken: In a large skillet, heat olive oil over medium-high heat. Add the seasoned chicken breasts and cook for about 5-7 minutes on each side until golden brown and cooked through. Remove from the skillet and let rest.
4. Make the Sauce: In the same skillet, add the chicken broth and heavy cream. Stir well, scraping up any browned bits from the bottom of the pan.
5. Add Cheese: Gradually add the shredded Monterey Jack cheese to the sauce, stirring until melted and creamy.
6. Combine Ingredients: Slice the cooked chicken and return it to the skillet. Add the cooked spaghetti and toss everything together until well coated in the sauce.
7. Add Tomatoes: If using, stir in the diced tomatoes for added flavor and color.
8. Garnish and Serve: Remove from heat and garnish with fresh parsley, if desired. Serve warm.

These simple steps will guide you in creating a delicious Monterey Chicken Spaghetti that is sure to satisfy.