Method (mustard sauce) : Put all ingredients into a mixture jar, grind it carefully with little amount of water. After then take a kadhai, put on the gas stove, add two table spoon of mustard oil, one spoon of Jeera, then put these mustard paste here, add small amount of water, cook into five minutes than switch off the gas flame.

Sandwich : Take four slices of bread cut into four corners, then take pan put on the gas flame, heat them add oil here, then put chopped onion, ginger garlic paste then chopped mushrooms, fried and cook well with 1/2 teaspoon of salt. Add chopped coriander leaves.

After than spread curd on this bread put cooked mushrooms, spread little amount of mustard sauce,with little amount of chat masalas and serve it.