Sauté the Vegetables
Heat olive oil in a large skillet over medium-high heat.
Add the green bell pepper and red onion. Sprinkle with oregano, salt, and black pepper.
Cook for 5–6 minutes until softened but still crisp. Remove from skillet and set aside.
Cook the Ground Beef
In the same skillet, add the ground beef.
Cook for 8–10 minutes, breaking it into crumbles as it browns.
Drain any excess grease, if necessary.
Stir in taco seasoning and water. Let simmer until the liquid is absorbed. Remove from heat.
Assemble the Bowls
Divide chopped romaine lettuce among 4 serving bowls.
Add toppings to each bowl: black beans (if using), cooked peppers and onions, seasoned ground beef, shredded cheese, corn salsa, tomato salsa, and guacamole or sliced avocado.
Garnish and Serve
Top each bowl with a dollop of sour cream, fresh cilantro, and a squeeze of lime. Serve immediately.
