Add the sliced kiwis, jalapeño slices, lime juice, and agave to a mason jar or cocktail shaker. 2. Muddle, pressing the kiwis until well mashed. 3. Add tequila and margarita mix and shake well. 4. Strain, pressing through a fine mesh sieve to get all the juice from the kiwis. 5. Pour over 2 cocktail glasses filled ice, and garnish with additional kiwi slices.