Hallson Gardens

My son was give a couple tomatoes and told they were Russian heirloom. They are real big, between 3/4 and 1 pound each, and shaped like a human heart. They are absolutely delicious. I looked them up and found they are probably Anna Russian Heirloom variety. Has anyone grown them? Any tips? Anyone canned them? They are real meaty, so I was thinking they might make good sauce. Hopefully, I can start some plants for next summer's garden.
Gloria