Pressure Cooker Beef Stroganoff

Ingredients

• 1 tbsp olive oil
• 500 g beef chuck (1.1 lbs)
• 2 onions
• 1/2 celery stalk
• 2 cloves of garlic
• 750 ml water (3 cups + 1/4 cup)
• 100 g fresh button mushrooms (3.5 oz)
• 1/2 tsp dried oregano, 1/2 tsp dried thyme and 1/2 tsp dried marjoram
• 1 bay leaf
• 1 tbsp chopped fresh parsley
• 1/4 tsp tomato paste
• 1 tsp dijon mustard
• 1 tbsp dried porcini mushrooms
• 2 tsp butter (10g)
• 10 g all purpose flour (1 tbsp + 1 tsp)
• 50 g sour cream (1.8 oz)
• 50 g heavy cream (1.8 oz)
• 1 tsp olive oil (for finishing)
• 1/2 leek (for finishing)
• 100 g fresh button mushrooms (3.5 oz) (for finishing)
• 1 handful of fresh parsley