tortilla comparison

Today at the grocery store I saw some smallish potatoes that looked like they could be useful for some cooking project, so I bought them. Upon returning home I saw that there was a recipe on the bag for a potato onion frittata. I wanted to try it because it sounded suspiciously like tortilla española except that they made it a strange way. They suggested that you take the entire bag of potatoes and boil them until tender. While you're doing that you're supposed to chop up and onion and a few cloves of garlic and sauté them until the onions are soft.

Then you slice up the potatoes and mix them with the onions, salt and pepper, and some herbs and put them in a pan with some olive oil.

You add 6 to 8 eggs mixed with a little milk and pour that on top. Then the whole things goes in the oven at 375 for 30 minutes. When it comes out it looks like this:

I liked it OK, but it wasn't as good as real tortilla.