Heat Shallots, Garlic, Blackberry Jam, And Red Wine In A Saucepan Over Medium-High Heat. Simmer Until Reduced To 1/2 Cup Of Liquid, About 15 Minutes. Strain Liquid Through A Fine Mesh Sieve And Set Aside. Heat The Beef Broth In A Separate Skillet Over Medium-High Heat Until Reduced By Half, 15 To 20 Minutes. Whisk The Two Reduced Sauces Together, And Stir In The Butter. Season With Salt And Pepper. Heat A Skillet Over Medium-High Heat. Cook The Venison Steaks Until They Are Beginning To Firm, And Are Hot And Slightly Pink In The Center, 3 To 4 Minutes Per Side. An Instant-Read Thermometer Inserted Into The Center Should Read At Least 145 Degrees F (65 Degrees C). Serve The Steaks With The Sauce And A Few Fresh Blackberries.