Contrasting textures and flavours will allow you to make indulgent recipes that will appeal to your customers.
So try bold contrasts:
- of textures, like crunchy and soft (e.g. melted cheese + grilled bacon, or walnuts + courgette)
- of flavours, like sweet and savoury (e.g. goat's cheese + pear + honey, or cured ham + fig)
And finally, don't forget to season your sandwich! Herbs, spices, and pepper provide flavour and colour for a limited cost.