Preheat oven to 350 F. Split the baguette in the middle but be careful not to cut all the way through. Open up the baguette. Place the baguette on a baking sheet. Spread with 1 Tbsp of coconut oil on one side and mayonnaise on the other side. Place one slice of provolone cheese in the middle of the baguette, then top with 2 slices of tomatoes. Pop into the oven and let it bake until the cheese is nicely melted, about 10 minutes. Pull it out and top with the roast beef and pop it back in for about 3-5 minutes (just to warm it up a little) and then pull it out and top with some slices of jalapeno if using and then cilantro leaves. Serve immediately
Notes
Another great substitute for the roast beef is rotisserie chicken. That will make one heck of a banh mi too ! The version I made for my kids are to split the baguette horizontally like a regular sandwich and omit the chili. Once the sandwich is assemble, I cut it into 3 equal portion. It's easier for them to manage