Butter two slices. Liberally apply green chutney on the unbuttered sides of both the bread slices. On one of the slices, start layering with boiled potato slices, cucumber slices, tomato slices, onion slices and capsicum rounds. Sprinkle chaat masala pwd and black pepper pwd on top.
Layer with a cheese slice (optional). Top with the bread slice and toast till golden brown. Serve warm with tomato ketchup.