Instant Pot Onion Tomato Soup (adapted from the Tastes of Home, 2005)

One of my favorite recipes from The Tastes of Home is a simple Onion Tomato Soup.  There’s no particular genius to this recipe but it surprised me with its simplicity and elegance.  At heart it’s a French onion soup recipe, with silky thin-sliced onions in a hearty beef broth.  Toss in a can of tomatoes……