01 -
Heat the olive oil in a large pot over medium-high heat.
02 -
Add the ground meat and cook for about 8 minutes until browned, using a wooden spoon to break it into smaller crumbles.
03 -
Add the chopped onions and cook, stirring occasionally, until softened, around 5 minutes.
04 -
Stir in minced garlic, tomato paste, oregano, and red pepper flakes. Cook for about 1 minute while stirring continuously.
05 -
Pour in the water and use a wooden spoon to scrape up any bits of meat or onion sticking to the bottom of the pot.
06 -
Stir in the crushed tomatoes, 3/4 teaspoon of salt, and a generous pinch of black pepper. Bring the sauce to a low simmer and cook uncovered for 25 minutes, stirring occasionally and adjusting the seasoning to taste.
07 -
About 15 minutes before the sauce is done, bring a large pot of salted water to a boil and cook the spaghetti as per package instructions, testing for doneness a minute or two earlier.
08 -
Remove the sauce from the heat, stir in fresh basil leaves, and toss the cooked pasta in the sauce. Allow it to sit for a minute to absorb flavors, then toss again.
09 -
Serve the spaghetti topped with freshly grated Parmesan cheese and additional basil if desired.