In a large skillet over medium heat, crumble the lean ground beef. Add in chopped green onions, garlic powder, kosher salt, black pepper, sriracha (if using), and low sodium soy sauce. Cook for about 6-8 minutes, stirring frequently until the beef is browned and fully cooked. Once ready, transfer the cooked beef to a plate and set it aside.

In the same skillet, add about 1 tablespoon of avocado oil and heat over medium-high. Once shimmering, add the shredded Brussels sprouts, seasoning them with a pinch of salt and pepper. Sauté for about 5-7 minutes, stirring occasionally, until the sprouts are tender and beautifully caramelized with golden edges.

Return the cooked ground beef to the skillet with the Brussels sprouts. Pour in the sweet chili sauce and fresh lime juice, stirring everything together until fully combined. Allow the mixture to heat through for another 2-3 minutes, ensuring all flavors meld beautifully.

Remove the skillet from heat and serve the sweet chili ground beef and Brussels sprouts immediately, garnished with sesame seeds if desired. This delightful dish can be enjoyed over a bed of rice or on its own for a wholesome meal bursting with flavor.