Raspberry mimosa

Ingredients 

• 1 bag frozen raspberries (approximately 2 cups)
• 1/4 sugar (or more depending on taste, see below)
• 1 cup heavy cream
• 1 bottle of Martin & Rossi Asti Champagne - or - Sparkling Wine (Asti is more of a sweet champagne, you can use a dryer champagne for more of a bitter sweet taste)
• Fresh raspberries for garnish