Egg tofu & prawn with luffa egg gravy

Ingredients

• 1/4 cup chicken stock
• 250g prawns, shelled and de-veined
• 2 tube of egg tofu, sliced into 2 cm pieces
• 1 luffa, halved and sliced thinly
• 1 egg, beaten
• Olive oil / Corn oil
• A dash of pepper
• Corn flour