Preheat the oven to 350°F (175°C).
Pickled Carrots and Daikon: Combine carrots, daikon, salt, and sugar in a small bowl and toss to coat. Allow to rest for 10 minutes until the liquid has been drawn out of the vegetables and the salt and sugar are completely dissolved. Add vinegar and water and transfer to a small, sealable container. Let sit at room temperature for 1 hour.
Place the baguette slices on a baking sheet and toast in the preheated oven for about 5 minutes or until golden.
Once toasted, spread the mayonnaise evenly inside the baguette. Layer with ham, roast beef, pickled carrots and daikon, cucumber, chili peppers and cilantro
Mix together the ingredients for the lemon sparkling water. Serve over ice if desired.
Enjoy your delicious meat and cold cuts banh mi with chips, pickles, lemon sparkling water.