Preheat your Traeger Timberline XL to 225* with the super smoke feature enabled.
Using a sharp knife, score the surface of the fat cap in a crosshatch pattern.
Season the picanha roast all over with Garlic Junkie Seasoning.
Insert a Meater wireless thermometer probe in the center of the meat and pair it to the app.
Set the desired temperature to 130* and place the roast in the center of the grill.
Close the lid and allow the roast to reverse sear for about 60 minutes.
When the meat is approaches an internal temperature of 120*, turn on the griddle of your Traeger Flatrock to high heat.
Pull the meat from the Timberline and transfer it to the hot griddle.
Sear on all sides for 90-120 seconds per side, until the internal temperature reaches about 130*.
Pull the roast from the grill and tent loosely on a cutting board.
While the meat rests, make the farofa.
In a cast iron skillet on the Traeger Timberline's induction burner, cook the chopped bacon until rendered and beginning to crisp.
Stir in the butter and stir until melted and combined.
Add the onion and cook until softened.
To the butter/bacon mixture, add the cassava flour and stir to combine.
Cook for 5-7 minutes, stirring frequently, until golden brown and fragrant.
Stir in the garlic and season to taste with salt and pepper.
Remove the farofa from the pan and transfer to a serving dish.
Slice the picanha roast into 1/2 inch slices using a long slicing knife.
Serve the meat with farofa.