Tofu is curd made from crushed Soya beans. Here's a casual recipe -

  1. Add 100grams of tofu, cut in small cubes
  2. Add 10 grams of salted peanuts
  3. Add any salted / spicy snack 10-20 grams
  4. Add quarter spoon of lemon juice

Within three minutes you will get a quick snack. No cooking required. 
Total cost - Rs.30 = ~$0.50 (Tofu - Rs. 22, Rs. 4 for snacks, Rs. 2 for peanuts, Rs. 2 for Lemon juice.)