If you are trying to avoid the favors type look. Order bite size mithai if you can. Get nice round looking silver trays & set up the individual pieces on top of each other in a tier. Make sure you place a wax paper on the tray first. It’ll have a more clean look & no sheera drops that way. You can even do this the night before your engagement & cover it with plastic wrap so the mithai doesn’t get dry.
If you have more than one sister. Get another nice looking silver tray. Creatively fill it with colored napkins( maybe match your outfit) & colored toothpicks. One person holds the tray & offers mithai & the other person can help with a napkin & toothpick to grab mithai from.
Or you could also get bite sized mithai but in place it in a larger tray & fill individual pieces with toothpick & just offer them with a colored napkin.
This was for a baby shower we did.
Don’t know how practical the two people serving part is but see if it suits you. When you individually serve guests at any gathering it just makes them feel more special. Another way of thanking them to be a part of your happiness.