Mama Lan's Vietnamese Stir

• 12 male blue crabs
• 5 serrano chiles (fresh)
• 3 stalks lemongrass
• 3 ginger (fresh peeled)
• 250 gr salt and pepper
• 85 gr butter
• 90 ml olive oil
• 38 gr sugar
• 34 gr garlic (minced)
• 26 gr pepper flakes (hot)