Step 1

1 In a large bowl, toss together the cabbage, carrot, bell pepper, chile and cilantro

Step 2

2 Stir in the yogurt, salt and pepper until thoroughly combined

Step 3

3 Taste, and season with more salt, if needed

Step 4

4 Place 4 slices of bread on your work surface and divide the yogurt mixture evenly among them

Step 5

5 Top the sandwiches with the remaining slices of bread

Step 6

6 Heat a medium frying pan or griddle over medium heat until hot

Step 7

7 Add 1 teaspoon of butter and 1/2 teaspoon mustard seeds

Step 8

8 Let them sizzle for a few seconds, then place two sandwiches in the pan (on the mustard seeds) and cook until golden and crispy on the bottom, 1 to 2 minutes

Step 9

9 Turn them over, add another 1 teaspoon butter, and cook until golden on that side, 1 to 2 minutes

Step 10

10 Transfer the sandwiches (and any stray mustard seeds) to a plate and repeat with the remaining sandwiches

Step 11

11 Serve them whole or cut into triangles, with ketchup or chile sauce, if desired