Subse se pehle ek kadai me mushroom ko boil karein or stock ko nikaal krr mushroom ko slice cut karein or ek pan me 1 tbs buter add karein or melt karein or mushroom ko saute karein add stock or abh 2nd pan me 2 tbs buter add karein add 1 tbs refined flour or halka sa brown karein or isko rouy bana krr mushroom or stock me add karein or jabb thick ho jaye ho tab namak and black paper add lemon juice or aap ki mushroom sauce ready