- 1 (8 ounce) package penne pasta
- 1 teaspoon olive oil
- 1 onion, chopped
- 3 cups chopped cooked chicken
- 1 (14 ounce) can Italian-style diced tomatoes
- 1 (10 ounce) package spinach
- 1 (8 ounce) package cream cheese, softened
- 1 1/2 cups shredded mozzarella cheese
- Preheat oven to 375 degrees F (190 degrees C).
- Bring a large pot of lightly salted water to a boil; add penne and cook, stirring occasionally, until tender yet firm to the bite, about 11 minutes. Drain.
- Heat olive oil in a skillet over medium-high heat. Saute onion in hot oil until tender, 5 to 7 minutes.
- Mix penne pasta, onion, chicken, diced tomatoes, spinach, and cream cheese together in a baking dish until the cream cheese melts and coats everything. Sprinkle mozzarella cheese over the pasta mixture. Cover baking dish with aluminum foil.
- Bake in the preheated oven for 30 minutes. Remove foil and continue baking until heated through and beginning to brown along the edges, about 15 minutes more.