Pizza peppers...

I love thick-walled and productive pizza peppers.  One source is Territorial Seed, where they describe them as hot, but I haven't found them to be hot at all.  They're juicy and delicious. Totally Tomatoes may offer the same variety, hard to know.

And they're certainly the most substantial peppers that I've ever grown (in terms of being as close to as thick-walled as greenhouse peppers).

'Pizza' peppers

Here's an image of a couple of peppers from the garden (one from the Piedmont, one from the mountains). The larger one is from a well-watered mountain container, the smaller was on its own.

I left the edge of the lime in the photo for a size perspective.  They're not big, but delicious and the plants are productive!