Roasted Acorn Squash with Browned Butter–Orange Vinaigrette

This elegant, wintry side dish was inspired by a recipe from “Gjelina” by chef Travis Lett. Deeply caramelized roasted squash is finished with a sauce of browned butter, orange juice and white wine vinegar, the bright acidity of the liquids balancing the richness of the butter. Roasted pistachios lend both texture and vivid color, and their flavor echoes the nuttiness of the browned milk solids in the butter. To double the recipe, place the oven racks in the upper- and lower-middle positions and roast the squash on two baking sheets; halfway through cooking, when flipping the squash slices, also switch the position of the baking sheets. The sauce is easily doubled.