PLACE chicken stock, yucca and carrots in large saucepan on high heat; bring to a boil. Reduce heat to a simmer. Add onion and tomatoes; cover. Simmer, stirring occasionally, for about 10 minutes.
HEAT oil in large skillet on medium heat. Add garlic, chiles and ginger; cook for 1 minute or until garlic turns translucent. Add conch meat; cook, stirring occasionally, for 2 minutes. Add conch mixture to saucepan. Stir in evaporated milk, coconut milk, salt, black pepper and cumin. Cook, stirring occasionally, until mixture just comes to a boil. Remove from heat. Stir in cilantro and serve.