Mushroom - Cooking like a Boss

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

56g 0.056kg 0.123lb 1.98oz margarine for onion	melt	cook til soft and translucent	sweat 8 minutes	simmer 1hr with lid	blend until conceptually smooth
2 onion	chopped
680g 0.68kg 1.5lb 24oz button mushrooms	wash and quater
94g 0.094kg 0.207lb 3.32oz margarine for mushrooms
2tsp 0.01l 10ml ²⁄₃tbsp 0.042cup 0.018pint parsley
2l 2000ml 133 ¹⁄₃tbsp 400tsp 8.45cup 3.52pint chicken stock