Spray the basket of the Ninja Foodi lightly with olive oil spray.
Slice the steak against the grain into 6 pieces, as evenly as possible.
In a small bowl, combine the vinegar, oil, garlic, and salt. Just lightly mix it. It's not going to fully combine.
Take about 3 asparagus and place them in 1 slice of steak, roll it up and place it in the basket of the Ninja Foodi.
Continue this process for all of the steak. For this recipe, the basket will fit 3 at a time.
Once there are 3 in the basket, add in half of the tomatoes.
Using a brush, brush the steaks and the vegetables with the oil and vinegar mixture.
Cook using the air crisp function at 390 degrees for 10 minutes using the attached lid with the Ninja Foodi. (Note - I do recommend checking on them at 5 minutes, we prefer them cooked until 10 minutes but your desired doneness may vary.)
Carefully remove and repeat the process for the remaining 3 steaks.
Serve the steak wrapped asparagus with tomatoes.