01 -
Preheat the oven to 450°F. Line a large baking sheet with parchment paper.
02 -
Evenly distribute the Brussels sprouts on the prepared baking sheet.
03 -
In a small bowl, combine extra virgin olive oil, kosher salt, and black pepper. Drizzle mixture over Brussels sprouts and toss to achieve even coating. Arrange sprouts cut side down in a single layer.
04 -
Transfer to oven and roast for 20 to 25 minutes, or until sprouts are tender, golden brown, and edges appear crisp. Remove from oven and set aside.
05 -
While sprouts roast, cook diced beef in a large skillet over medium heat until rendered and crispy, about 8 to 10 minutes. Line a plate with paper towels.
06 -
Transfer crispy beef to the lined plate to drain excess fat. Set aside.
07 -
Carefully remove excess beef fat from the skillet, reserving approximately 4 tablespoons in the pan.
08 -
Add chopped onions and diced shallots to the same skillet. Set heat to medium-low. Cook, stirring frequently, until onions and shallots are deeply caramelized, about 15 to 20 minutes.