Ingredients
1 large sweet potato, peeled and diced
3 medium carrots, cut into 1/2-inch pieces
3 stalks celery, cut into 1/2-inch pieces
2 leeks, halved lengthwise and cut into 1/2-inch pieces (white and light green parts only)
3/4 cup dried yellow or red lentils
1 4-inch piece ginger, peeled and finely grated
1 teaspoon curry powder
Kosher salt
1 tablespoon unsalted butter
2 cloves garlic, thinly sliced
Juice of 1/2 lemon, plus lemon wedges for serving (optional)
1/2 cup chopped fresh cilantro