01 - Heat 1 tablespoon olive oil in a large skillet over medium heat. Add turkey bacon and cook for 3 to 4 minutes until browned and crisp. Remove with a slotted spoon and set aside.
02 - Add remaining 1 tablespoon olive oil to the skillet. Add finely chopped onions and sauté for 2 minutes until translucent.
03 - Place Brussels sprouts cut side down in the skillet. Cook undisturbed for 4 to 5 minutes until golden brown.
04 - Stir in minced garlic and season with kosher salt, black pepper, and optional red pepper flakes. Cook for 4 to 5 minutes, stirring occasionally, until sprouts are tender yet still vibrant green.
05 - Return cooked turkey bacon to the skillet and toss thoroughly with the Brussels sprouts mixture.
06 - Remove from heat. Drizzle with fresh lemon juice and sprinkle with grated Parmesan cheese if desired. Serve warm.