Make the dressing: In a small bowl, whisk the Greek yogurt, lime juice, olive oil, honey, chili powder, cumin, and garlic. Season with salt and pepper. Add water a little at a time until it’s pourable but still creamy.
Set aside.
Prep the veggies: Chop the lettuce, slice the tomatoes, dice the pepper and cucumber, and thinly slice the red onion. Rinse and drain the black beans. If using canned corn, drain it; if frozen, thaw it.
Cook the aromatics: Heat a large skillet over medium heat.
Add olive oil if your beef is very lean. Sauté the diced onion for 3–4 minutes until softened. Add the minced garlic and cook 30 seconds until fragrant.
Brown the beef: Add the ground beef to the skillet, breaking it up with a spatula.
Cook until no longer pink, about 5–6 minutes. Spoon off any excess fat if needed.
Season it up: Stir in chili powder, cumin, paprika, oregano, salt, and pepper. Add the tomato sauce and water.
Simmer 2–3 minutes, stirring, until saucy and well-coated. Taste and adjust seasoning.
Assemble the bowls: Divide lettuce among bowls. Top with warm seasoned beef, black beans, corn, tomatoes, bell pepper, cucumber, and red onion.
Add the finishing touches: Spoon on the dressing.
Add avocado and cheese if using. Sprinkle with cilantro, a squeeze of lime, and a handful of tortilla strips for crunch.
Serve: Enjoy right away while the beef is warm and the greens are crisp.