2cupsfresh blood orange juiceyou’ll need about 6 juicy blood oranges
A lime half for moistening the glass rims
Coarse salt or sugarKosher
Juice the blood oranges. In a pitcher, stir together the lime juice, sugar and 3/4 cup water until the sugar has dissolved. Add the tequila, Cointreau and blood orange juice. Cover and refrigerate until chilled, about 1 hour.
Moisten the rims of three 6-ounce martini glasses with the cut side of a lime half. Spread coarse salt or sugar on a small plate and press the rims of the glasses until coated.
Fill a cocktail shaker about 3/4 full of ice and measure in 1 1/2 cups of the margarita for 3 drinks. Cover and shake for about 15 seconds to thoroughly chill the mixture. Strain into the glasses. Dress the glasses with a slice of blood orange and a slice of lime.