Tom rim man (caramelized garlic shrimp)

Ingredients

• 500 g medium shrimps, peeled and cleaned
• 4 tbsp peanut oil, divided
• 1 ½ tbsp sugar
• 1 garlic clove, chopped
• 1 shallot, chopped
• 4 tbsp water
• 1 tbsp fish sauce
• ¼ tsp salt
• Cilantro for garnishing