I make a variation of the Italian staple that roughly translates to "tomato potatoes".
It is very easy and a crowd pleaser for sure.
I use Italian seasoning instead of basil, add 1 onion cut into about 1" square slices.
And bake at a higher temp of 380 on a METAL pan...NOT a glass baking dish.
The onions will not char well using glass and the browned/charred onions add such flavor.
Sooooooooo, you season a cut up onion, roast it and pretend it's a tomato, potato............?
I got interrupted

I half 3-4 potatoes, depending on size lengthwise. And then slice about 1/4" slices
Cut an onion into about 1" slices
If it is tomato season I will dice up a couple tomatoes, or off season use 1 can of diced tomatoes
Put all in a bowl, add salt and pepper to liking, add about 1 TB of Italian seasoning, maybe 1/4 cup of olive oil (I don't measure often I take the oil cruet and pour some over it.
Mix it all together and pour out onto a large baking pan (NOT glass, onions won't char in glass as well)
Bake at 380 for about 30 minutes...check potatoes for doneness, onions on bottom should be charred well.
Good stuff...
.you'll make it again...and again