One simple recipe: cook spinach (boil, steam, microwave), wring out water, add salt and sesame oil to taste.
A cup of milk has about 300 mg.
Also, most of the calcium in the spinach is in the form of oxalates, which are not readily absorbed (and if they are absorbed, may contribute to the formation of kidney stones).
One simple recipe: cook spinach (boil, steam, microwave), wring out water, add salt and sesame oil to taste.