Featured Images Cropped on Homepage

Hi, the Featured images I add to posts are getting cropped on the homepage in the recent posts section. I’m not using a widget for recent posts, just the standard way WordPress handles recent posts for the Foodica theme.

I was able to fix this years ago when my site was active, but don’t recall how. I recently re-activated it last week from scratch, so the problem persists. I tried the Regenerate Thumbnails plugin but it did not fix the issue. Any idea on how to re-adjust the Featured images on the homepage so the entire image is displayed (at a smaller size, of course)? Thank you.