Carrots and Brussel Sprouts

Ingredients:
2 tablespoons chopped shallot (from 1 medium)
3 tablespoons unsalted butter, divided
1 pound carrots, cut diagonally into 1/2-inch-thick pieces
1 pound Brussels sprouts, halved lengthwise
1/3 cup water
1 tablespoon cider vinegar

Directions:
Cook shallot in 2 tablespoons butter in a 12-inch heavy skillet over medium-high heat, stirring occasionally, until softened, 1 to 2 minutes.
Add carrots, Brussels sprouts, 3/4 teaspoon salt, and 1/2 teaspoon pepper and cook, stirring occasionally, until vegetables begin to brown, 3 to 4 minutes.
Add water and cover skillet, then cook over medium-high heat until vegetables are tender, 5 to 8 minutes.
Stir in vinegar, remaining tablespoon butter, and salt and pepper to taste.

Cooks' note: Vegetables can be cut 1 hour ahead and kept at room temperature.