Boil about half a package of vermicelli. I chose it because it cooks fast.
Grease a baking dish - I used an 8x8.
Add half the cooked spaghetti.
Top with sauce.
Add another layer of spaghetti.
Top with more sauce.
Sprinkle breadcrumbs over the top.
Of course if you eat cheese, which I don't, you will put some grated cheese between the layers and on top before, or instead of, the breadcrumbs.
Bake a few minutes in a preheated 350º F. oven.
That's it. Easy peasy. And delicious.