Pêche (Peach) Mint Julep Cocktail

1. Fill a Lindemans glass half-full with ice and mix in .75 oz mint simple syrup, .75 oz freshly squeezed lemon juice and .75 oz bourbon with a cocktail spoon.
2. Top up with 4.5 oz (half a small bottle) Lindemans Pêche lambic beer and stir again briefly.
3. Fill the glass, if needed, with more ice.
4. Garnish with a straw and a generous branch of mint, activated first by grinding it (clapping or slapping).