Sear the short ribs in olive oil over medium-high heat.
Remove the short ribs and sauté the onions and garlic in the same pot.
Add beef broth, soy sauce, and Worcestershire sauce to the pot.
Return the short ribs to the pot and cover, cooking on low heat.
Remove the ribs, shred the meat, and strain the broth.
Thicken the strained broth with cornstarch mixture.
Bake the tater tots according to package instructions until crispy.
Assemble the poutine: layer tater tots, shredded beef, cheese curds, and gravy.
Garnish with green onion slices and serve immediately.