Step 1

Preheat the oven to 400°. In a small bowl, toss the carrots with the rice vinegar and sugar and let stand for 10 minutes; drain.

Step 2

In a small bowl, whisk the mayonnaise with the Tabasco, tomato paste and garlic and season with salt and pepper.

Step 3

Form the meat into four 6-inch-long oval patties, about 1 inch thick. Season with the curry powder and salt and pepper. In a large skillet, heat the oil until shimmering. Cook the patties over moderate heat, turning once, until medium, about 12 minutes.

Step 4

Meanwhile, spread the butter on the cut sides of the baguette. Set the bread cut side up on a baking sheet and bake for about 5 minutes, until lightly toasted. Spread the Tabasco-spiked mayonnaise on the bread and top each baguette section with a burger patty, pickled shredded carrots, pickled jalapeño slices and cilantro sprigs. Close the sandwiches and serve hot.