Start by heating a drizzle of olive oil in a large skillet over medium-high heat. Once hot, add your diced chicken and season with salt, pepper, garlic powder, and Italian seasoning. Let the chicken cook for about 5 minutes, stirring now and then. You want it mostly cooked but still tender. Once it’s ready, remove it from the pan and set it aside.
Without cleaning the pot (because flavor!), add your minced onion and garlic. Let them sizzle for 2–3 minutes until the onions are soft and translucent. This step builds the flavor base that makes the whole dish pop.
Pour in the jar of marinara sauce, then fill the empty jar with water and pour that in too. Stir everything together and bring it to a gentle boil. Then lower the heat slightly and let it simmer—this is when the magic starts!
Return the mostly cooked chicken to the pot. Add in your pasta and stir to combine. Cover the pot and let everything simmer for about 10–15 minutes. Stir occasionally so the pasta doesn’t stick. Cook until the pasta is tender and has absorbed the flavors of the sauce.
Once the pasta is cooked, stir in the Parmesan and 1/4 cup of shredded mozzarella. This makes the pasta extra creamy and flavorful. Stir gently so the cheese melts into every bite.
Now for the best part! Sprinkle the remaining mozzarella over the top. Cover the pot again for 2–3 minutes to let it melt into a gooey, cheesy layer. You’ll know it’s ready when the top looks irresistibly melty.
Sprinkle fresh basil or parsley over the top for that final touch. Add a bit more Italian seasoning if you like. Serve hot and enjoy your delicious, one-pot creation!