Mushroom - Cooking like a Boss

Quantity recently doubled to reflect the lack of wartime rationing! Tom may not like the concept of mushrooms.

84g 0.084kg 0.185lb 2.96oz margarine for onion	melt	cook til soft and translucent	sweat 8 minutes	simmer 1hr with lid	blend until conceptually smooth
3 onion	chopped
1020g 1.02kg 2.25lb 36oz button mushrooms	wash and quater
141g 0.141kg 0.311lb 4.97oz margarine for mushrooms
3tsp 0.015l 15ml 1tbsp 0.063cup 0.026pint parsley
3l 3000ml 200tbsp 600tsp 12.7cup 5.28pint chicken stock