Bring 2L water to boil while you prepare potatoes
Peel potatoes and dice into approx. 2cm sized cubes
Add the potato to water when it's at full boil. Start a 10minute timer now. Remove from water after 10mins. It will take a while for the water to return to the boil but that's ok. It's still 10mins total from adding them to the already boiling water, to taking them off. You only want them slightly par boiled, not cooked. Drain potato then add it to slow cooker.
Add in the cooking cream, diced bacon, garlic and mustard powder.
Gently mix to combine
Cook on low
After cooking for 2.5hrs, gently fold through chives and chopped egg, but avoid excessive stirring so as not to mash up the soft potato pieces
Then continue to cook for another 30mins to warm egg etc if it's been in fridge until now.
Total cooking time is 3hrs on low (test that potato is tender and cooked through)
Serve as a hot side to your main dish, or could be refrigerated as a cold side to your next BBQ or salad