Preheat Oven To 160°C. Grease A Medium Sized Cake Pan With Butter And Dust With Flour.

In A Bowl, Sift Together The Flour, Baking Powder And Salt, Set Aside.

In A Small Saucepan, Heat Milk And Butter Just Until Butter Is Melted.

In A Big Bowl, Beat The Condensed Milk And Sugar For 4-5 Minutes Until Mixture Is Light And Creamy. Add The Vanilla And Mix.

Carefully Pour Milk Mixture Into The Creamed Condensed Milk, And Mix For A Minute Or So.

Gradually Add Flour Mixture In Two Batches And Fold The Mix Gently Together With A Metal Spoon Using Big Scooping Movements.

Then Add Lemon Juice, Lemon Zest, Chopped Red Chilli And Nuts, Fold The Rest In Very Gently.

Pour The Batter Into A Greased Baking Pan. Bake At 160°C For 44-50 Minutes Or Until A Toothpick Inserted In The Center Comes Out Clean.