Gravy for sausages?

[IntoValhalla]

Doing sausage and mash for dinner but I’ve got none of my mum’s delicious sausagey, oniony, gravy left in the freezer
I’ve got:

• Pork Sausages
  
• Onions
  
• Various stock cubes (beef, lamb, veg, maybe pork ones but not 100% sure)
  

Plus all the usual cupboard staples like flour etc.
I’ve tried a few times to make a good sausage gravy and it’s just never as good as my mum’s - which is why I stockpile her’s in my freezer usually
Any help would be much appreciated!! Can’t ask my mum as she’s on holiday

[DameDiazepamTheDramaQueen]

Melt some butter in a saucepan, add sliced onions and saute slowly for about ten mins. Add a sprinkle of flour then add a dissolved beef stock cube and stir to thicken. Add some wholegrain mustard to taste and or lots of black pepper. Let simmer for a few mins .

[IntoValhalla]

Thanks Dame - I did it minus the mustard and it turned out lovely

[DameDiazepamTheDramaQueen]

Oh brilliant, I often leave the mustard out too

[IntoValhalla]

DC2 smashed it down with an impressive amount of mash

DC1 was less enthusiastic but she’s weird about the slightest sliver of visible onion