- In a saucepan, cook the onion, garlic and hot pepper flakes in the oil. Break up the tomatoes with your hands and add to the saucepan. Bring to a boil. Simmer for 5 minutes.
- Cook the pasta until al dente in salted boiling water. Meanwhile, add the beans to the sauce and cook for about 4 minutes. Drain the pasta and add to the sauce. Stir well. Season with salt and pepper. Remove from the heat and add the cheese. Stir until the cheese has melted. Divide into shallow bowls, sprinkle with chives and serve.