CHICKEN EMBUTIDO WITH GRAVY

1 medium size carrot
kinchay or chinese celery
1/2 tsp salt and pepper
1 tsp dried oregano
1 tbsp garlic powder
1 tsp paprika
1 tsp turmeric
1 1/2 tbsp cornstarch
450 grams ground chicken or pork or chicken
1 tsp all purpose flour
8 tbsp cooking oil
Gravy
2 tbsp cooking oil
2 tbsp butter
2 tbsp all purpose flour
1 cup water
2 tbsp soy sauce
2 tbsp oyster sauce
chopped scallions or Cilantro