In a large heavy-bottomed skillet
, pot or Dutch oven, heat 2½ tablespoons butter over medium high heat. Add the shallot, mushrooms, kale, and ½ teaspoon kosher salt, reduce heat to medium, and cook until the shallots are translucent, stirring often, about 3 minutes. Add 1½ cups Arborio rice and stir to combine; cook for 2 minutes. Increase heat to medium-high and add ¾ cup white wine. Cook, stirring, until liquid is almost evaporated, a few minutes.