In a medium bowl, combine the lettuce, beans, zucchini, tomatoes, cucumbers, onions, cheese, and mint.
In a small bowl, whisk the vinegar, oil, water, oregano, and pepper. Pour over the lettuce mixture; toss to mix well.
Line the bottom of the baguette with the basil. Spoon the lettuce mixture on top.
Replace the top of the loaf. Cut the baguette into 4 equal pieces.
Please Note: Nutritional values listed may vary from final results depending on actual measurements and brands used to prepare the recipe.