Melt unsalted butter until hot on medium heat, add chopped onions, and saute until soft, translucent, and fragrant.
2 Tablespoons unsalted butter, ½ cup onion
Add the sausages and break them up into smaller chunks. Cook until no longer pink.
1 lb pork sausages (removed from casing)
Add chopped garlic, stir to combine, and cook until fragrant. In the meantime, pour whole plum tomatoes into a bowl and crush them with your hands.
½ Tablespoon garlic
Pour the crushed tomatoes into the pan, add tomato paste, crushed fennel, ¼ cup of water, red pepper flakes, salt, and black pepper, and stir to combine. Simmer for 8-10 minutes on medium-low heat.
1 teaspoon fennel seeds, 400 g whole plum tomatoes, 1 teaspoon red pepper flakes, Salt and pepper to taste, 2 Tablespoons tomato paste
While the tomato sauce is simmering, cook the pasta in a separate pot for 1 minute less than the package instructions. Once done, drain and set aside, reserving about 1 cup of pasta water for later.
½ lb pasta
Add grated parmesan cheese to the sauce, tear a few basil leaves, and add them to the sauce, stirring it well to combine.
5 g fresh basil, ½ cup Parmesan cheese
Finally, add the cooked pasta, toss or stir to combine. Add the reserved pasta water to loosen up the sauce if needed.
Take it off the and serve hot with additional parmesan cheese and fresh basil on top, optional. Enjoy!