Step 1: Heat the butter in a pan, put Ajwain, besan flour. Roast it till you get nutty flavor. Mix it with corn flour. Add little water and Blend it well. Keep aside.
Step 2: Take a bowl, add besan mixture, curd, red chili powder, gram masala, sugar, mustard paste and salt.
Step 3: Heat one teaspoon of oil, add turmeric powder in it. Add it to above mixture. Blend whole thing very well.
Step 4: Mix Paneer cubes, capsicum cubes and tomato cubes into the marinade mixture. Mix it very well. And leave it in the refrigerator for 30 minutes.
Step 5: Soak the satay sticks in the cold water for 1/2 an hour.
Step 6: Arrange the marinated vegetables and Paneer on a skewer. Grill it in a tawa/skillet, until slightly golden brown.
Step 7: Sprinkle with chaat masala, coriander leaves and lemon juice over the Paneer Tikka and serve as appetizer.