Cook rice according to package instructions.
In a skillet, brown the ground beef over medium heat.
Drain excess fat from the beef.
Add taco seasoning and a splash of water, simmer for 5 minutes.
Stir in black beans and corn, heating until warmed through.
In a bowl, layer cooked rice as the base.
Spoon the beef mixture over the rice.
Top with diced tomatoes and chopped onion.
Add sliced avocado and shredded lettuce.
Drizzle with salsa and serve immediately.