But to answer your afrocentric question, the different empires each had their own established slave networks and infrastructure in Africa (logistics as has already been stated), see: 1  Arab slave trade. 2  Barbary slave trade. 3  Slavery in the Ottoman Empire.
Asparagus is a vegetable belonging to the lily family, which also includes onions, leeks and garlic. Eat asparagus as part of a heart-healthy diet, as it contains no fat, no cholesterol and very little sodium.
1 Some fresh chopped herbs like tarragon, rosemary, thyme, sage, basil or parsley can make a great addition to your roasted asparagus. Just sprinkle the herbs on top of the asparagus before roasting. You can add as much or as little as you like!  Dried herbs.