Put some corn oil on the pan and put the frozen sausages in low heat. Keep them rolling for even browning for 8-12 minutes until desire doneness.
Put the bread in a steamer for 5 minutes.
Slice the tomatoes lengthwise put in a bowl and add the chimichurri sauce. Toss until fully mixed.
Once the sausage are done, use the same pan a grill the jalapeño until half cook. And slice and use as desire.
Put a sausage in the bun, add the mixed tomatoes with chimichurri and add jalapeños as desired.