Step 1

Pop your spaghetti in salted boiling water and cook until al dente. Scoop out a cup of starchy pasta water JUST before draining.

Step 2

Meanwhile fry the mushrooms in a little olive oil over medium heat until they begin to brown. Add garlic and a pinch of salt & pepper, then fry for another 1-2mins until the garlic just begins to pick up colour.

Step 3

Melt in 2 heaped tbsp butter, then pour in 1/3 cup / 80ml of the starchy pasta water. Whisk with your wooden spoon to emulsify with the butter, then turn heat down slightly and stir in the Marmite.

Step 4

Add spaghetti and toss to coat in the sauce. Sprinkle in parmesan and parsley and continue to gently toss until the sauce thickens around the spaghetti.

Step 5

Check for seasoning then serve hot with more parmesan!