To start, place the whole milk in a medium saucepan over medium heat. Separate the onion petals and add them to the milk. Also, add the bay leaf.
Heat the milk until it just starts to steam. Stir it slowly to prevent a skin from forming on the milk's surface. Do not allow the milk to boil.
Once it starts steaming, remove it from the heat. Cover the pot with a lid or sheet of plastic wrap. if you use the wrap, poke some holes to allow the steam to escape. Set the milk aside to cool for about 10 minutes.
Once your milk has been infused, strain the onion petals and bay leaf from the milk.
In a separate saucepan, melt the butter completely.
Once the butter has melted, remove it from the heat. Add the flour and whisk until you have a uniform lump-free paste.
Still working off the heat, slowly incorporate the milk in small batches. Use the same technique as in recipe 1.
Place the lump-free sauce base back on medium heat. Bring the sauce to a boil while whisking constantly.
Then, you can reduce it to simmer for 5 minutes, still while stirring.
If you are happy with the consistency, whisk in the ground nutmeg. Then, season your homemade Hello Fresh cream sauce base with sea salt and black pepper to taste.