Sauté: Bring a large cast iron skillet to a medium-high heat and add 1 tablespoon butter to melt. Add the shallots to the hot pan and move around to soften.
Simmer: Add the white wine and let it simmer and reduce for about 5 minutes. Pour in the cream and let simmer for another 3 minutes.
Butter: Now add the remaining butter, 1 tablespoon at a time, and whisk to emulsify as they melt.
Taste: Finally, whisk in the lemon juice & lemon zest and taste to see if any flavors need to be adjusted to your liking. Option to add a little salt and pepper, if you want.