Agua de tuna (prickly pear drink)
Late summer is tuna season across the central highlands, from Hidalgo and the Estado de México down to Puebla's Teotihuacán valley, and that is when the big vitroleros in markets and taquerías turn shocking pink. Agua de tuna is just the cactus fruit blended with water, lime and a little sugar, strained, and poured over ice with lunch. Red tunas give a vivid colour and a taste between watermelon and pear; green ones make a paler, more herbal drink. It should be light and thirst-quenching, never syrupy. The commonest mistake is blending too long: the hard seeds crack and the agua turns gritty and slightly bitter. Pulse briefly, just enough to free the pulp, then strain well. It is ready when the liquid runs smooth through the sieve and tastes clearly of fruit with only a lift of lime. Handle unpeeled tunas with tongs or gloves: even 'cleaned' ones keep tiny glochids. Chef's tip: chill the peeled fruit before blending; cold pulp keeps its colour bright and needs less ice to dilute it.
























