Step 1: Brown the meat. In a large skillet over medium-high heat, cook the ground beef, breaking it up with a spoon, until fully browned. Drain any excess grease.
Step 2: Season the meat. Stir in the taco seasoning and 1/4 cup water. Simmer for 2-3 minutes, allowing the sauce to thicken. Remove from heat.
Step 3: Prepare the dressing (if using homemade). In a small bowl, whisk together mayonnaise (or sour cream), chopped cilantro, lime juice, minced garlic, cumin, salt, and pepper until well combined.
Step 4: Assemble the salad. In individual bowls or a large serving platter, start with a bed of chopped lettuce.
Step 5: Layer the toppings. Evenly distribute the seasoned ground beef over the lettuce. Add cherry tomatoes, black beans, corn, red onion, avocado, and shredded cheese.
Step 6: Garnish and serve. Top each salad with a dollop of sour cream or Greek yogurt and a spoonful of salsa. Sprinkle generously with crushed tortilla chips. Drizzle with your homemade creamy cilantro-lime dressing, or your preferred dressing. Serve immediately with optional fresh cilantro, pickled jalapeños, and lime wedges.