Bulgur Wheat, Sweet Potato, and Black Bean Casserole — The Mom 100

Ingredients

• 3 cups cooked bulgur wheat
• 2 cups diced fresh tomatoes ((or 1 15-ounce can; no need to drain))
• 1 (15.5-ounce) can black beans, rinsed and drained
• 2 ½ cups shredded or slivered provolone ((or Gruyere or other firm cheese; divided))
• 6 scallions ((white and green parts; trimmed and minced; divided))
• ¼ cup sour cream ((plus more to serve if desired))
• ½ cup heavy cream
• ½ cup chicken or vegetable broth
• 2 teaspoons pureed chipotles in adobo sauce
• Coarse or kosher salt and freshly ground pepper ((to taste))
• 1 large sweet potato ((very thinly sliced))
• Lime wedges ((to serve))