Line a large baking sheet with parchment paper.
In a small bowl, mix together the softened cream cheese, cheddar and lime juice.
Cut each jalapeno in half lengthwise. Remove the seeds and any membrane. You will have 6 pieces.
Cut each jalapeno half in half again lengthwise. You will have 12 pieces.
Cut each jalapeno slice in half in the middle (not lengthwise). You will now have 24 pieces.
Spoon about 1 good teaspoon of the cheese mixture onto each jalapeno piece. Push a mini sausage into the cream cheese.
Open the crescent roll dough and tear into triangles. Cut each triangle into 3 strips, starting at the small pointed end and then cutting upwards. to the larger end. You'll end up with 24 thin triangular pieces of dough.
Place a jalapeno-cheese-frank on the large end of one of the small triangles and roll it up to the smaller end. Transfer to the parchment paper-lined baking sheet seam-side down. Repeat with the remaining franks, leaving about 1" of clearance between each one.
Place the baking sheet into the fridge for 10 minutes.
Meanwhile, preheat oven to 375 F. Also whisk together the egg and milk in a small bowl.
Remove tray from fridge and brush the tops of each pastry bite with the egg wash. Sprinkle with a bit of the salt.
Bake 12-20 minutes or until golden brown.
Let rest 5 minutes before transferring to a platter and serving.