Tuna And Mushroom Cream Over Pasta

• 4 shallots
• 2 garlic (cloves)
• 240 ml evaporated nonfat milk
• 80 gr button mushrooms
• 30 ml corn oil
• 10 gr parmesan cheese (grated)
• 8 gr chives (fresh)
• 3 gr italian parsley (fresh)
• 1 package tuna in spring water (white)