This is a true one-pot meal: meat, pasta, and veggies all cook together and, thanks to the super-skinny angel hair spaghetti, they cook together quickly. Plus, since you boil the pasta right in the sauce, the flavor soaks into every strand -- which is a good reason to use a great-tasting sauce.
In a large, heavy pot over medium heat, sauté the beef until it is browning in places and no longer pink —3 or 4 minutes.
Add the sauce and cook, stirring, for a minute or two, then stir in the salt, sugar, olive oil, water, pasta, and greens.
Stir constantly until the mixture comes to a boil, then turn the heat down to low, cover the pot, and simmer gently — stirring frequently so that the bottom doesn't scorch —for 10 or so minutes, until the pasta is tender.
Serve with grated parmesan cheese.