To flavor with basil (though this usage is rare).
तुलसी डालना
English Usage: I will basil the soup to enhance its taste.
Hindi Usage: मैं सूप में तुलसी डालूंगा ताकि इसका स्वाद बढ़ सके।
tulsi dalna, tulsi daalna, tulsi dalnaa, tulsee daalna, tulsi dalana