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1
If you plan to make custard then take the milk out of the fridge and allow it to warm to room temperature in advance.
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2
Slice the apple into 6-8 equal pieces and remove the core.
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3
Then cut the pieces into 5 mm thick wedges.
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4
It doesn't matter if you don't peel them.
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5
Coat the apples in sugar and cinnamon powder and pack them into the bottom of a heat-resistant dish (I used light brown sugar).
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6
Place the flour and butter into a plastic bag and rub together with your fingers until it becomes like fine panko (don't worry if a few lumps remain).
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7
Mix the sugar into the mixture from Step 4 (this amount of sugar will make the crumble quite sweet so you can reduce it if you wish).
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8
Lay the crumble over the apples from Step 3, and press it down with the palms of your hands to even out the surface.
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9
Bake in an oven preheated to 180C until the surface is golden.
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10
This should take approximately 40 minutes.
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11
[Custard] Combine the eggs, sugar and 2 tablespoons of milk in a small saucepan and stir until smooth.
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12
Warm the remaining milk in a microwave for 40 seconds without letting it boil.
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13
Then pour it into the saucepan a little at a time.
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14
Place the saucepan over medium heat and continue to stir, without letting the mixture boil, until it thickens.
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15
When thick, stop the heat and add a dash of rum to finish.
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16
Serve a portion of crumble in a dish with some hot custard.
