Hearty Tomato Ground Beef Soup for friends

Gary and Devon visiting from Kelowna and after a bit of running around and shopping in the big city we wanted to stay home, eat an easy, delicious dinner and perhaps play some 'tile rummy'. 
This Hamburger Tomato Soup is so quick and easy for those busy days. This is one of those soups that if made the day ahead it only gets better.
This time I used my 'instapot' to make it even quicker. Prep takes 15-20 minutes, cooking time 20 minutes and your dinner is done.  Serve it with fresh, crusty bread.  Enjoy!

1 white onion
450 grams ground beef  ( I have used turkey as well and it is also delicious)
1 cup diced celery
1 1/2 cups carrots - chopped
3 fresh tomatoes - diced
4 bay leaves
1 tbsp. oregano
1 large potato - diced
1 tsp. beef bouillon
1 can tomato sauce or tomatoes diced (398 ml)
1 can tomato paste ( 5.5 oz.)
4 cups of soup broth