Step 1Preheat oven to 200 °C/ 400 °F (fan assisted), or 220 °C/ 425 °F (conventional). Line a large oven tray with baking paper. Slice the mushrooms into thick slices (approx. 1/4 inch/ 1/2 cm)
Step 2Beat the eggs in one bowl and add all of the dry ingredients into another.