The most delicious barbecue recipe

INGREDIENTS: • pork neck - 3 kilograms • mineral water (carbonated) - 700 milliliters • onion - 1.5 kilograms • lemon - half a teaspoon (you can add a whole one, it's a matter of taste) • vegetable oil - 100 milliliters • tomato - 200 grams • parsley or cilantro - 15 grams • thyme or red basil - 2 grams (can be used dry) • salt - 27 grams • ground black pepper - 10 grams • sweet ground paprika - optional