For the broth, heat up cooking oil in a pressure cooker. If you do not own a pressure cooker, you can use a normal pot. Pressure cooker just makes everything faster.
Sauté vegetables and tomato paste for several minutes.
Then, transfer your Rouladen into your pot. Make sure the German beef roulades touch the bottom of the cooker, so that we can get a nice brownish colour on both sides of the rolls.
Pour beef broth into the pressure cooker and almost covering the beef Rouladen.
Season the broth with salt and ground black pepper according to taste. Cover the pressure cooker with lid and cook according to instructions.
Cook the roulades for about 30 to 45 minutes in a pressure cooker and 1 to 1.5 hours in a normal pot.
Once cooked, removed the roulades and discard vegetables/ chunks.