Quiche/Frittata bar (This is one option for the cupcake quiches / frittata (nearly the same- quiche is more milk based and frittata more egg based. Shown is: chorizo (beef) and spinach. Can also do all veggies, spinach and sausage etc)
I have also seen similar centerpieces that use epsom salts instead of sugar. You could also sprinkle a mix of pearls/gems. Sand (or sugar), faux pearls, a 3 candle. An easy DIY wedding centerpiece idea.