Mango Tofu Tacos

INGREDIENTS

• 3 tablespoons coconut oil, or more as needed
• 1 onion, chopped
• 1 serrano chile pepper, chopped
• 2 cloves garlic, finely chopped
• 2 (14 ounce) packages tofu, cut into chunks
• 1 bunch fresh cilantro, finely chopped (stems and leaves separated)
• 1/4 (1 ounce) package taco seasoning mix, or more to taste
• 1 teaspoon ground cumin
• 1 teaspoon ground coriander
• 2 mangos, peeled and cut into small chunks
• 1/4 (1 ounce) package taco seasoning mix
• 1 pinch chili powder, or to taste
• salt to taste
• 1 teaspoon ground cumin, or to taste (optional)
• 1 teaspoon ground coriander, or to taste (optional)