In a saucepan, add the pasta, drained tuna, tomato sauce, chopped onion, and chopped basil.
Add Water, Salt, and Pepper:
Pour in 200 ml of water into the saucepan. Season with salt and pepper to taste.
Cook the Pasta:
Place the saucepan over medium heat. Stir the ingredients to combine. Bring the mixture to a gentle simmer.
Simmer and Stir:
Allow the mixture to simmer while stirring occasionally. Cook until the pasta is al dente and the sauce has thickened, usually about 15-20 minutes. If the sauce thickens too quickly, you can add a little more water as needed.
Serve:
Once the pasta is cooked to your liking and the sauce has reached the desired consistency, remove the saucepan from heat.
Enjoy:
Serve your delicious pasta with tuna and tomato sauce hot. The combination of tuna, tomato sauce, onions, and basil creates a flavorful and satisfying meal.