Thai-Spiced Vegan Sweet Potato Stew

Ingredients

• 1 tablespoon olive oil
• 1 medium onion, quartered and thinly sliced
• 4 to 6 garlic cloves, minced
• 3 medium sweet potatoes (about 1½ pounds), peeled and diced
• 3 cups water
• 1 medium green or red bell pepper, cut into narrow strips
• 1½ cups frozen green beans
• ½ teaspoon
• red
• or
• green curry paste
• , or to taste
• 1 tablespoon
• sugar
• 2 teaspoons minced fresh ginger
• 2 stalks lemongrass (optional)
• 1 (13.5-ounce) can
• light coconut milk
• 2 tablespoons
• peanut butter
• Salt to taste
• 1 (8-ounce package)
• Thai peanut-flavored baked tofu
• , diced (optional)
• Cilantro leaves for garnish