When one doesn’t have the high tech gear or knowledge, you make do with what you have- in this case a colander! I heard about this in my photo group today- and evidently it’s a very well known technique- so I gave it a try. I took many shots of the shadow of the moon over the sun as projected through the colander (also a saltine!) on our driveway. Then I tried other places and found it made a pretty good shadow on iris leaves. They look like little hearts, don’t they?
melinda anderson photography 
Colander! I wish I would’ve thought of that!