Mee Goreng Mamak (Fried Mamak Noodles)

For the sauce:

• 1 tablespoon Sweet soy sauce kecap manis
• 2 tablespoons oyster sauce
• 3 tablespoons tomato ketchup
• 1 teaspoon dark soy sauce
• ¼ teaspoon salt
• 1 teaspoon crispy prawn chilies optional

For the chili paste:

• 3 fresh red chilies
• 1 tablespoon water

For the Mee Goreng Mamak:

• 3 tablespoons vegetable oil
• Half an 8-oz block firm tofu cut into 1 1⁄4-inch cubes
• 2 cloves garlic finely chopped
• 8 ounces raw peeled tiger prawns
• 1 tomato cut into 6 wedges
• 2 stalks choy sum roughly chopped
• 14 ounce package fresh yellow noodles
• 2 green onions sliced
• 4 ounces bean sprouts
• salt to taste
• 4 Lime wedges
• 3 tablespoons crispy shallots