Peanut Butter Mascarpone Mousse with Caramel

Ingredients

• , ½ cup (125 mL) ,granulated sugar
• , 1 tsp (5 mL) ,lemon juice
• , ¼ cup (60 mL) ,whipping cream
• , 1 tbsp (15 mL) ,butter, cut into cubes
• , ½ cup (125 mL) ,peanut butter, preferably smooth
• , ¼ cup (60 mL) ,mascarpone cheese
• , ¼ cup (60 mL) ,brown sugar
• , 1 tsp (5 mL) ,vanilla
• , ¾ cup (175 mL) ,whipping cream
• , ,Shards of peanut brittle or coarsely chopped candied peanuts