Melt butter over low heat to 150°
While butter is melting, add Egg Yolks, Lemon Juice and Salt to a wide mouth mason jar.
Using an immersion blender, whirl for about 10 seconds, until mixed and foamy.
Once butter is the right temperature, drizzle into yolk mixture gently, and a little bit at a time, blending constantly.
Your sauce will thicken as you blend. If too thick, you can add a bit of water, a teaspoon at a time, to bring to the consistency that you desire.
Drizzle over veggies, seafood, or Eggs Benedict.... or use as a lovely dipping sauce. Enjoy.