In a medium bowl, stir together radishes, bell peppers, carrot, onion, dill, and salt. Add cream cheese, stirring until combined.
Evenly spread approximately ¼ cup cream cheese mixture onto each of 6 frozen bread slices, leaving a border just inside crust. Cover with remaining bread slices. Using a serrated knife in a gentle sawing motion, trim and discard crusts from sandwiches. Cut each sandwich in half. Serve immediately, or cover with damp paper towels, place in an airtight container, and refrigerate for a few hours until serving time.
Recipe by TeaTime Magazine at https://teatimemagazine.com/vegetable-cream-cheese-tea-sandwiches/