First, make the peach puree.
Peel, slice and dice the two peaches, and add to a blender. Squeeze in the juice of the two limes. Blend until smooth.
For each margarita, pour 1oz of triple sec, 2oz of tequila, 1oz of simple syrup/agave, and ½ cup of peach puree in a shaker. Add in a few ice cubes, and shake vigorously until blended.
Grab a glass, and wet the rim with a small piece of lime. Dip the rim in sugar, and add a few ice cubes into the cup. Pour in your margarita, and garnish the cup with a slice of lime and slice of peach. Serve immediately!
*Note: my peach puree made enough for about 3 margaritas*