Sweet Potatoes With Tahini Butter
2-1⁄2 pounds sweet potatoes of any color (about 4 medium), washed 6 tablespoons butter (3⁄4 stick), melted 1⁄4 cup well-stirred tahini 2 to 3 tablespoons freshly squeezed lime juice, plus lime wedges, for serving 2 tablespoons low sodium soy sauce…