Delicious and easy Tri-Tip Sliders are a real crowd pleaser.  Juicy beef, peppery arugula and sweet onions.  They go together in no time with impressive results! So, I decided to make beef for dinner. I wanted to prepare Tri-Tip Sliders with Caramelized Onions and Sriracha Aioli Sauce. I run to Costco to pick up a Tri-Tip,