Grilled Chicken Sandwich With Smoky Red

• 1 onion (red)
• 1 tomato
• 1 salt
• 1 assorted baby lettuces
• 90 ml lime juice (fresh)
• 60 ml mayonnaise
• 34 gr cilantro (chopped fresh)
• 26 gr chili powder
• 8 gr cracked black pepper
• 6 gr cumin