Plan ahead to make this family-pleasing meal in a bowl. To squeeze more juice from citrus fruits, first bring them to room temperature. Then roll the fruit on the kitchen counter, pressing with the palm of your hand to break the membranes.
- Cook the ground beef and onion in a large saute pan over medium-high heat, occasionally breaking the beef into small chunks as it cooks for 5 minutes or until the beef is lightly browned.
- Meanwhile, whisk together the vinaigrette ingredients in a small bowl.
- Stir the taco sauce into the beef. Reduce the heat to low and simmer, stirring occasionally, for 2 minutes. Season with salt and pepper. Remove from the heat and cover to keep warm.
- Toss the romaine and tomato with the vinaigrette in a large bowl. Divide between salad bowls. Top with the warm meat mixture, tortilla chips, cheese, and cilantro.