Toss strawberries with sugar and vanilla and spread onto a parchment paper-lined baking sheet. Oven roast for about 25-30 minutes until the strawberries turn syrupy.
Once cool, add the strawberries to a blender with a splash of water. Blend until smooth. This is our roasted strawberry purée for our margarita.
If you'd like a salted rim, run a lime slice along the edge of the serving glass and then swirl in coarse sea salt like so.
Pour the roasted strawberry purée, tequila, orange liqueur, lime juice and simple syrup into a cocktail shaker. Add a handful of ice.
Now put on the cocktail shaker top and give it a good, vigorous shake. About 15-30 seconds does the trick.
Fill that glass with a salted rim with ice. Remove the cocktail shaker top and strain into the glass. Sip and enjoy!