Butter Sauce (Beurre Blanc)
because butter goes with everything
things you’ll need: butter, shallot, white wine vinegar, white wine, salt, more butter. Additions/substitutions include lemon, or other acids/vinegar/wine/liquor, mustard, garlic, capers, red pepper, cream, parmesan (or other cheese), broth, herbs, mushrooms, nuts, whatever you decide sounds good.
incidentally vegetarian (with no meat broth) and gluten-…