Preheat oven to 400°F. Line a baking sheet with parchment paper.
In a large bowl, toss the cooled rice with melted butter, Worcestershire sauce, garlic powder, onion powder, and salt.
Spread the rice mixture into an even layer onto the prepared baking sheet. Bake for 25-35 minutes, tossing halfway through, until crispy and golden brown. Watch closely to prevent burning.
Remove rice from the oven, break into small pieces, and set aside.
To a medium skillet over medium heat, add ground beef, garlic powder, salt, and pepper. Cook, stirring occasionally, until no pink remains, 8 to 10 minutes. Drain grease. Set aside to cool slightly.
In a large bowl, make a bed of the lettuce. Add the cheddar cheese, tomatoes, pickles, red onion, ground beef, and crispy rice.
Pour dressing over salad and toss to combine. Serve immediately.