Combine soy sauce, 1/4 teaspoon salt, thyme, and next 4 ingredients (thyme through pork); toss well to coat. Heat 1 1/2 teaspoons oil in a large nonstick skillet over medium-high heat. Add pork mixture; sauté 4 minutes or until done. Remove from pan; keep warm. Add the remaining 1 tablespoon oil and butter to pan. Add onion, bell pepper, plantains, 1/2 teaspoon salt, and black pepper; cook 6 minutes, stirring occasionally. Stir in garlic; sauté 2 minutes or until plantains are tender. Drizzle with hot sauce, and stir well. Sprinkle with cilantro.
Use semiripe plantains--not green or soft, ripe black ones. The plantains brown better if not stirred too much as they cook. Look for bottled mango slices in the produce section of the supermarket.