In a very large skillet, melt butter over medium-high heat. Add mushroom and shallot; cook, stirring occasionally, for 8 to 10 minutes or until vegetables begin to brown. Add Broccolini; cook, stirring frequently, for 2 minutes. Stir in wine, salt, and pepper; cover and cook, stirring occasionally, for 8 minutes or until Broccolini is crisp-tender. Uncover, stir in vinegar, and cook for 2 minutes.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/sauteed-broccolini-and-mushrooms-recipe/