Add garlic, salt, pepper, dijon, mayo and half a lemon, ⅓ cup freshly grated parmigiano, and miso paste to a large bowl and whisk together.
Slowly drizzle in olive oil, whisking consistently until everything is emulsified. You can turn the bowl on its side to make it easier.
If making a salad right away, add lettuce on top and toss together. Add the remaining cheese on top and toss again. Taste and finish with remaining lemon, flaky salt and pepper if needed.
Video
Notes
I don't like croutons in my caesar salad but by all means add them if you do!