Which fruit is in the picture?

Acca sellowiana – a species of flowering plant in the myrtle family, Myrtaceae – is native to the highlands of southern Brazil, eastern Paraguay, Uruguay, northern Argentina, and Colombia. It is widely cultivated as an ornamental tree and for its fruit. Common names include feijoa, pineapple guava and guavasteen, although it is not a true guava. It is an evergreen, perennial shrub or small tree, 1–7 metres (3.3–23.0 ft) in height.

The fruit, known as feijoa maturing in autumn, is green, ellipsoid, and about the size of a chicken egg. It has a sweet, aromatic flavour, which tastes like pineapple, apple and mint. The flesh is juicy and is divided into a clear, gelatinous seed pulp and a firmer, slightly granular, opaque flesh nearer the skin. The fruit falls to the ground when ripe and at its fullest flavour, but it may be picked from the tree prior to falling to prevent bruising.

The fruit pulp resembles the closely related guava, having a gritty texture. The feijoa pulp is used in some natural cosmetic products as an exfoliant. Feijoa fruit has a distinctive, potent smell that resembles that of a fine perfume. The aroma is due to the ester methyl benzoate and related compounds that exist in the fruit.