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1
Heat oil in a large pot over moderate heat.
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2
Add garlic and onions, saute until onion is soft.
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3
Add tomato paste, mix well, pour in tinned tomatoes and stock.
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4
Add vegetables to pot and bring to the boil, cooking until vegetables are just tender.
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5
Cover and set aside.
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6
In a separate saucepan melt the butter and stir in the flour, cooking over medium heat for a few minutes.
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7
Gradually add the milk, about a 1/4 cup at a time, whisking well between each addition to get rid of lumps.
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8
Continue until all the milk has been added.
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9
Heat milk sauce until it gets thick, stirring constantly.
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10
Take off heat and whisk in grated cheese.
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11
This will now be a thick, white sauce.
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12
Preheat oven to 180C Line a baking dish with baking paper or spray with olive oil spray.
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13
Line the dish with a single layer of lasagne sheets.
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14
Scoop out about 1/2 cup of the tomato-vegetable mixture and pour over sheets.
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15
Top with a layer of white sauce.
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16
Add another layer of tomato mixture, then white sauce then lasagne sheets.
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17
Continue until all the tomato mixture and white sauce is used up, making sure you finish with the white sauce on top.
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18
Sprinkle with extra cheese put in the oven.
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19
Bake until lasagne sheets are soft and cheese is golden.
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20
Remove from oven and let settle for 10 minutes until serving.