You can saute and cook with vinegar instead of cooking oil.
Vinegar is much healthier to saute food with than cooking oil.
Most people commonly saute and cook spinach with vinegar which makes the spinach more nutritious than it would be without using the vinegar.
You can cook spinach in advance and then store the spinach in the refrigerator for up to 2 days.
Spinach can be made and cooked for up to 2 days in advance and then reheated in the microwave or on the stove.
You can also freeze leftover spinach if you need to keep cooked spinach longer than a few days.
Cooking Spinach does kill bacteria.
That is as long as you cook the spinach to at least 160 F degrees for at least 15 minutes.
When you cook the Spinach at 160 F for 15 minutes bacteria such as E Coli can and will be killed in the spinach.
Sauteed Spinach is healthy.
In fact studies have shown that when you cook or Saute Spinach or other vegetables it becomes more nutritious.
Also Sauteing the Spinach in Vinegar makes it more healthy because the vinegar has vitamins and it helps make the nutrients in the spinach more easily absorbed by your body.
Cooking or sauteing Spinach and other vegetables also releases antioxidants by breaking down cell walls which in turn results in much higher blood levels of beta-carotene which is an antioxidant thought to guard against heart disease and lung cancer.
Not only that but adding vinegar to Spinach makes the Spinach taste better.
Also adding vinegar to spinach makes the nutrients in the Spinach easier to digest because of the Vitamin C in Spinach.
Another thing is that when adding vinegar to spinach the vinegar helps to break down or concentrate the digestible iron in spinach.
That makes it more nutritious for your health.