Step 1

In a large skillet, cook beef and onion over medium heat until meat is no longer pink. Stir in the chili powder, garlic powder, bouillon, cumin and salt; remove from the heat.

Step 2

In a large bowl, combine the romaine, tomato, orange pepper and green onions. Spoon beef mixture into taco shells; top with salad mixture. Drizzle with dressing. Serve with cheese and sour cream if desired.