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1
Cake preparation: In a food processor, roughly grind walnuts.
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2
Set aside.
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3
In a heat proof bowl placed on a saucepan with warm water but not simmering (the bowl can't touch the water), melt the chocolate with butter while stirring until the mixture is creamy (personnaly I would melt the chocolate and butter in the microwave).
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4
Let cool slightly.
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5
In a bowl, with an electric mixer, beat eggs with the sugar at medium-high speed for 3 minutes or until the mixture is thick and foamy.
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6
Add salt and vanilla, then reserved walnuts and stir with a spoon.
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7
With a spatula, incorporate the chocolate mixture by folding delicately until the dough is homogeneous (don't stir too much).
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8
Spread the dough in a cake pan of 9 inches in diameter (that has parchment paper or is greased).
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9
Cook in a preheated oven of 350 F for about 30 minutes or until a tooth-pick inserted in the center comes out clean.
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10
Put the pan on a rack and let cool for 10 minutes, then remove from the pan.
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11
Sauce Preparation: Meanwhile, in a saucepan, melt butter.
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12
With a whisk, incorporate the flour.
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13
Add cream, sugar and salt and cook at medium heat, stirring, until the mixture has thicken and is simmering.
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14
Keep cooking, stirring, for 2 minutes.
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15
Remove the saucepan from the heat and incorporate walnuts and vanilla.
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16
Let cool slightly.
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17
When ready to serve, cut the cake in 8 slices (like a pie) and put creamy sauce on top.
