spicy cold tofu 涼拌豆腐

ingredients：
Chopped spring onion, chopped coriander, chopped red chili, toasted white sesame seeds

Seasonings:
Soy sauce: 3 spoons
Vinegar: 0.5 spoon
Sugar: 0.5 spoon
Sesame oil: 1 spoon
Hot oil: a small amount