In a high-speed blender, process cashews, tahini, lemon juice, apple cider vinegar, and water on high speed until completely smooth.
In a large bowl, whisk eggs very well. Stir in cashew mixture and salt.
Prepare a mini muffin pan by spraying with refined coconut or avocado oil. Alternately, use a silicone mini muffin pan and skip the spray oil. Place muffin pan on a baking sheet. Fill muffin pan with egg mixture a little more than 3/4 full, then top with a small piece of bacon the width of the muffin cavity.
Pour water into the baking sheet about halfway up the sides of the muffin pan. Carefully place in oven and bake for 90-180 minutes or until when you press on them, they slide around easily and are no longer liquid. Each oven will vary with such a low temperature, but keep an eye on them so they don't overcook! Test every 30 minutes after 90 minutes to see if they've fully solidified with the press test.
Recipe Notes
If you have a high-speed blender like a Vitamix, you can skip soaking the cashews, although it will make the mixture even smoother and more velvety!