Step 1
To prepare green spread, combine spinach, mint chutney and mayonnaise in a bowl and mix well. Add salt and crushed peppercorns and mix well.
Step 2
To prepare red spread, grate boiled beetroot in another bowl. Add tomato ketchup and mix. Add salt and crushed peppercorns and mix. Add mayonnaise and mix well.
Step 3
To prepare yellow spread, combine crushed corn kernels, mayonnaise and mustard paste in another bowl and mix well.
Step 4
Put some green spread on 8 bread slices. Similarly, put some yellow spread and red spread on 8 bread slices each.
Step 5
Pile 1 red bread slice, 1 yellow bread slice, 1 green bread slice, 1 red bread slice, 1 yellow bread slice and 1 green bread slice on top of each other and cover with the remaining plain bread slice. Similarly, prepare the remaining sandwiches.
Step 6
Trim the edges of the sandwiches using a serrated knife. Cut into triangles.
Step 7
Serve immediately.