Combine strawberries, sugar, and lemon juice in a baking dish. Roast strawberries for about 8-10 minutes until soft.
Remove and let cool.
Combine tarragon and cream and refrigerate for a half hour. Strain out leaves.
Combine cream, confectioners' sugar, and vanilla in a stand mixer. Whip to just past soft peaks, but not firm.Carefully fold strawberries into cream. Divide among small dessert glasses and serve.