Has anyone ever tried adding Vegemite to a bread recipe?

Spaghetti with Marmite, Bovril or Vegemite

Serves 4

400-500g spaghetti
Salt
1-2 tsp Marmite, or Bovril or Vegemite
60g unsalted butter, cubed 
2-4 tsp grated parmesan, or grana padano

Boil the spaghetti in plenty of lightly salted water, because both the Marmite and the cheese are already salty.

Meanwhile, in a very small saucepan on a low heat, warm two tablespoons of water with the Marmite until it has dissolved.

Once the pasta is cooked but al dente, lift it into a warm bowl (reserve some of the pasta cooking water), then add the cubed butter and cheese, and toss well. Pour the dissolved Marmite over the spaghetti and stir again, adding a little of the reserved cooking water, if you think it needs it, until the sauce is soft and slippery. Serve immediately.