Make the Sandwich Spread:
In a small bowl, combine yogurt, mayonnaise, green chutney, black pepper, and salt
Mix together thoroughly until smooth and well combined
Taste and adjust seasoning if needed
Set aside
Prepare the Components:
Wash cilantro and mint thoroughly and pat completely dry with paper towels
Chop cilantro and mint roughly into small pieces
Wash and dry cucumber, then slice thinly (about 1/8 inch thick)
Pat cucumber slices dry with paper towels to remove excess moisture
Trim the Bread:
Using a sharp serrated knife, cut off all the brown edges (crusts) from the 4 bread slices
Make clean, straight cuts to create uniform square or rectangular bread pieces
Assemble the Sandwiches:
Lay out all 4 trimmed bread slices on a clean work surface
Spread a generous amount (2-3 tablespoons) of the green sandwich spread on all 4 slices, covering edge to edge
On 2 of the spread-covered slices, sprinkle chopped cilantro evenly across the surface
Add chopped mint on top of the cilantro
Arrange cucumber slices on top of the herbs, overlapping slightly to cover the entire surface
Top with the remaining 2 spread-covered bread slices, spread-side down
Press down gently to help everything adhere together
Cut and Serve:
Using a sharp serrated knife, cut each sandwich into 2 halves or 4 quarters
Wipe the knife clean between cuts for neat edges
Arrange on a serving plate or pack into containers
Serve immediately or within 2-3 hours for best quality
Storage Tip: Best served fresh within 4-6 hours of assembly. Can be kept at room temperature for 2-3 hours. If longer storage needed, refrigerate but note that bread may dry slightly. Do not make the night before.