Make the pork: In a cast-iron skillet, heat the canola oil over medium-high heat. Add the pork and sear, stirring occasionally, until golden brown and cooked through, 4 minutes. Remove from the heat and add the red nuoc cham to deglaze the pan, stirring to scrape off any meaty bits on the bottom of the pan. Set aside.
Assemble the banh mi: Spread half of the mayonnaise on the bottom and half of the chicken liver mousse on the top of each baguette. Layer half of the pork loaf slices on the bottom half of each baguette, then divide the seared pork over each. Garnish each with a pinch of pickled daikon, pickled carrot, peanuts, cucumber, red onion, jalapeƱos, cilantro, fried shallots and fried garlic. Place the top halves of each baguette on and slice each sandwich into 4 pieces, then serve.