Kubay? It’s bilonak, or bilbilonak. Bilonak? Oh, well, it’s alugbati (Basella alba), also called malabar spinach, malabar nightshade, phooi leaf, vine spinach, creeping spinach, and so on. It’s one basic leafy veggie loved by Ilokanos and all over da Pilipins.
Good for sinigangs and dinengdengs, but it’s usually prepared as a quick salad appetizer paired with fatty or fried/grilled meat or fish dishes, with bugguong and tomatoes or with calamansi juice squeeze: