Fillet of Beef, Mushroom and Stilton Rarebit Tarts with Celeriac Purée - Cookidoo® – the official Thermomix® recipe platform

Ingredients

• 70 g salted butter
• 140 g plain flour
• 40 g water
• 1 shallot
• 10 g unsalted butter
• 200 g chestnut mushrooms
• 3 - 5 sprigs fresh flat-leaf parsley
• 1 sprig fresh thyme
• ¼ tsp fine sea salt
• ¼ tsp ground black pepper
• 5 g truffle oil
• 40 g beer
• 75 g Stilton
• 100 g Cheddar cheese
• 30 g breadcrumbs
• 10 g plain flour
• 1 medium egg
• 1 egg yolk
• 2 tsp English mustard
• 1 dash Worcestershire sauce
• 600 - 700 g celeriac
• 380 g whipping cream
• ½ tsp fine sea salt
• 6 pieces beef fillet
• olive oil
• fine sea salt
• ground black pepper
• 2 Tbsp fresh parsley