Combine beef cubes with biscuit mix, salt, pepper, and paprika in a Ziplok bag and shake to coat. Brown beef cubes on all sides in a small amount of oil in a hot pan. Add tomatoes, onions, carrots, and garlic and cook until onions are soft. Add water to cover meat and vegetables, Cover and simmer till meat is tender, about 1 1/2 hours. Add more water if necessary during cooking time. Stir in sour cream, Worcestershire sauce, and add salt and pepper. Put mixture in a 2-quart heat proof, baking dish and place biscuits on the beef mixture. Bake at 425° for 15 to 20 minutes, until biscuits are browned.
To Make Biscuits:
Combine biscuit mix with sour cream, water, and chives. Stir until a soft dough has formed. Beat for 2 minutes. Knead a few times on a floured surface and then roll out to about 1/2-inch thick. Cut out with floured biscuit cutter. Place biscuits on top of casserole and bake.