Step 1

Thermomix Instructions:

Step 2

Preheat oven to 170 degrees celsius (160 degrees if fan forced)

Step 3

Grease and line a 17X28cm slice tray with baking paper, allowing the edges to overhang.

Step 4

Melt the butter and vanilla in the TM bowl for 40 seconds, Speed 2, 50 degrees.

Step 5

Scrape down the sides of the bowl.

Step 6

Melt for a further 1 minute, Speed 2, 50 degrees.

Step 7

Add the plain flour, rolled oats, salt, bi-carb soda, brown sugar and raw sugar.

Step 8

Mix for 20 seconds on Reverse, Speed 2.

Step 9

Scrape down the sides.

Step 10

Mix for a further 20 seconds on Reverse, Speed 2.

Step 11

Spread half of the crumb mixture into the bottom of the prepared tray and press firmly into an even layer.

Step 12

Bake in preheated oven for 15 minutes or until lightly golden.

Step 13

Remove from oven and put aside (leave the oven turned on).

Step 14

Place the zest of 1 lemon into the TM bowl.

Step 15

Grate for 20 seconds on Speed 6.

Step 16

Scrape the sides of the bowl.

Step 17

Repeat steps 13-14 until you have a very finely grated zest.

Step 18

Add the condensed milk, lemon juice, egg yolks and lemon extract and mix for 30 seconds, Speed 4.

Step 19

Scrape the sides of the bowl and mix for a further 30 seconds, Speed 4.

Step 20

Pour mixture over crumb crust in baking dish and spread into an even layer.

Step 21

Sprinkle the remaining crumble mixture over the top of the lemon layer.

Step 22

Bake in oven for 23 – 26 minutes or until lightly golden.

Step 23

Remove from oven and allow to cool.

Step 24

Cover and refrigerate for at least 2 hours (preferably overnight) then take it out and cut into squares.

Step 25

Store in airtight container in refrigerator.