Red Lentil, Peanut & Sweet Potato Soup

Ingredients

• 1 large sweet potato, peeled and diced
• 1-19 oz (540 mL) can diced tomatoes, with juice
• 1/3 cup (185 mL) split red lentils
• 1⁄4 cup (60 mL) chopped cilantro stems, saving leaves for garnish
• 1 jalapeño pepper, seeded and finely chopped
• 3 garlic cloves, crushed
• 1 Tbsp (15 mL) grated fresh ginger
• 4 cups (1 L) chicken or vegetable stock
• 1⁄4 cup (60 mL) peanut butter (optional)