or maybe it's a frittata.
Ready-To-Use Food And Drink Spot Illustrations by Susan Gaber 1982
Book as a whole is under copyright but contents are copyright-free
From archive.org
The structure a triacyglicerol, a.k.a fat. This fat molecule possesses three identical, saturated fatty acid (palmitic acid) units, linked to a glycerol molecule. Drawn in Inkscape.