Step 4
Heat 2 tablespoons unsalted butter in a 10-inch cast-iron skillet over medium and cook potatoes, chopped leeks, and chopped carrots until slightly softened about 8 minutes. Add mushrooms, 2 teaspoons kosher salt, chopped garlic, and 3/4 teaspoon black pepper. Cook until potatoes and mushrooms are tender, about 8 minutes, adding water, 1 tablespoon at a time if vegetables stick to the skillet. Stir in 12 ounces shredded, skinless Chicken and thawed green peas; remove from heat.