Passion fruit is a flowering tropical vine, known as Passiflora, that grows in warm climates, including South America, Australia, South Africa, and India. Passion fruit contains a soft pulp and lots of seeds inside a hard rind. People can eat the seeds and pulp, juice it, or add it to other juices.

Romaine or cos lettuce is a variety of lettuce that grows in a tall head of sturdy dark green leaves with firm ribs down their centers. Unlike most lettuces, it is tolerant of heat. In North America, romaine is sold as whole heads or as “hearts” that have had the outer leaves removed and are often packaged together.

Cabbage is a leafy green, red, or white biennial plant grown as an annual vegetable crop for its dense-leaved heads. It is descended from the wild cabbage, and belongs to the “cole crops” or brassicas, meaning it is closely related to broccoli and cauliflower; Brussels sprouts; and Savoy cabbage.