Spaghetti with green beans

1. Boil a pot of water. Add the pasta and cook until soft.
2. In a large pan, heat some olive oil over medium heat.
3. Add chopped onion and minced garlic to the skillet. Saute until fragrant.
4. Add sliced mushrooms and green beans to the skillet. Cook until the vegetables are tender.
5. Pour the marinara sauce into the skillet and stir to combine with the vegetables.
6. Let the sauce simmer for a few minutes to allow the flavors to meld together.
7. Add the cooked pasta to the skillet and toss everything together until well combined.
8. Serve the spaghetti with green beans hot, garnished with cheese if desired.