In a bowl, mix together the ricotta and 1 tablespoon sugar substitute. In a separate bowl, combine the Champagne with the fruit and 1 tablespoon sugar substitute.
Dampen the rims of 6 margarita glasses and roll in the shredded coconut to adhere around the rim. Place a couple tablespoons of fruit mixture in each glass, and top with a dollop of the ricotta mixture. Sprinkle with the lemon zest and pecans.
To garnish, stick a frill or sword pick with a strawberry and a couple blueberries on it in the top. There's a 1 drink limit!