You can cook these muffins in an air fryer or the oven.
If cooking in the oven, preheat to 180°C. Line six holes of a 12-hole nonstick muffin tray with liners.
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Use a protein shaker or handheld blender to mix the egg, milk, salt and self-raising flour until the mixture is thickshake consistency and all the ingredients are well combined.
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Pour the mixture to a depth of 1 cm into the six muffin holes.
Distribute the mushrooms, capsicum and spring onions evenly amongst the muffins, top each with a cube of cheese, then pour in the remaining mixture, stopping 1 cm from the top. Place half a cherry tomato on top of each muffin.
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Bake for 20 minutes in the oven, until golden brown. Insert a skewer into the centre of a muffin to check for doneness – if it comes out clean they are good to go.
If using an air fryer, cook at 180°C for 15 minutes.
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Let the muffins cool down a little before you attempt to take them out. Enjoy.
Place two cooled muffins in each lunchbox.
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