Cook the basmati rice according to package instructions, typically simmering it in water for 15-20 minutes until tender. Fluff the rice with a fork and set aside.

In a large skillet, heat 1 tablespoon of oil over medium heat. Add sliced onions, green bell peppers, and mushrooms, sautéing for about 5-7 minutes until softened and slightly caramelized.

In the same skillet, increase the heat to medium-high and cook the lean ground beef for 7-10 minutes, breaking it apart until evenly browned. Drain excess fat.

Stir in Worcestershire sauce and beef broth into the browned beef, letting it simmer for 2-3 minutes. Fold the sautéed veggies back into the skillet.

Sprinkle the shredded cheese evenly over the mixture, cover, and lower the heat to low. Cook for an additional 2-3 minutes until the cheese melts.

In meal prep containers, divide the fluffy basmati rice and top with the cheesy ground beef and vegetable mixture. Mix well before storing.