In a bowl, combine king fish, diced red onion, one and a half teaspoons of Seed + Stow Orange Zest Powder, lime juice and orange juice. Stir well. Cover and place into the fridge for 20 minutes, or up to one hour, stirring every 10 minutes.
Once fish has firmed up and ‘cooked’, stir through minced chilli, coriander, mint and orange segments.
Prepare avocados by mashing well and seasoning with salt and pepper.
To serve, scoop one tablespoon of avocado on to a tostada, top with 5-6 pieces of kingfish ceviche. Snap Seed + Stow Dried Orange Slices into quarters and use to garnish, along with microgreens (if using). Repeat with the rest of the tostadas and fish.
Before serving, sprinkle tostadas with remaining Seed + Stow Orange Zest Powder.