Preheat oven to 350°F and adjust rack to middle position. Lightly grease a 9x13-inch baking pan with 1 tbsp olive oil. In a medium bowl, whisk together eggs, milk, salt, pepper, and 4 oz TRF Sriracha Aioli.
Crumble sausage into 1/2-inch chunks and add to egg mixture. Stir 4 oz of the shredded cheese and medium chopped onion into egg mixture.
Pour egg mixture into baking pan and spread tater tots evenly on top. Lightly season with salt and pepper. Place in oven and bake for 40 minutes.
Sprinkle remaining cheese on top and place back in the oven for 5 minutes or until cheese is golden brown. Garnish with chopped green onion and TRF Sriracha Aioli.