1 serrano pepper, seeded and minced, or more to taste
3 cloves garlic, minced
1 lime, juiced
salt and ground black pepper to taste
Stir mango, tomatoes, onion, cilantro, serrano pepper, and garlic together in a bowl. Drizzle lime juice over the mango mixture and mix well. Season with salt and black pepper. Refrigerate until flavors blend and salsa is cold, at least 30 minutes.