Cook rice according to package directions
While rice is cooking, cook carne asada in a cast iron pan over medium-high heat with salt & pepper until cooked through
Remove cooked carne asada from pan and let rest for a few minutes before slicing
Cook corn & chop vegetables
Chop rested carne asada into thin slices
Place cooked rice in bowls
Top with carne asada, cabbage, spinach, corn, tomato, onion, cheese (if using), and sliced avocado
Dress with vinaigrette
Serve and enjoy