Soak the rice noodles in a pot with water for 15 minutes. Drain and set aside.
Get the shrimp, remove the head, and then put it into a separate bowl.
Then, smash the shrimp's heads and add water to get the puree. Set aside.
Heat oil in a pot. Sauté garlic until golden brown and transfer half of the sauteed garlic into a bowl. Set aside.
Add the onions into the pot with the ground pork. Cook and stir well.
Sprinkle with black pepper, fish sauce and the shrimp's head puree. Cook for about 5 minutes.
Remove the sauteed ingredients from the pot and set aside.
In another pan, combine 5 cups of water, annatto oil, and cornstarch. Cook for 10 minutes or until the cornstarch is melted. Stir continuously until the sauce became thick. Set aside.
In a separate pot, bring water to boil with the rice noodles. Simmer for 8-10 minutes.
Transfer the cooked rice noodles onto 4 plates equally and pour the sauteed sauce on top.
Get the crushed chicharon, crushed peanuts, cooked garlic, sauteed ingredients, and put them on the top of the Palabok. Put the sliced boiled eggs on top and sprinkle with sliced spring onions.
Serve with calamansi and enjoy!