Vietnamese Sour Soup

Ingredients

• 1 pound catfish or shrimp, cleaned and cut into bite-sized pieces
• 1 tablespoon vegetable oil
• 4 cups water or fish stock
• 1 medium onion, sliced
• 2 medium tomatoes, quartered
• 1 cup pineapple chunks
• 2 tablespoons tamarind paste or tamarind soup base
• 1 tablespoon fish sauce
• 1 tablespoon sugar
• 1/2 teaspoon salt, or to taste
• 1 cup bean sprouts
• 1 cup okra, sliced
• 2 bird’s 2-3 eye chilies, sliced
• Fresh herbs: Thai basil and cilantro
• Lime wedges, for serving