Combine lime wedges and mint in the bottom of a glass. Use a muddler or the bottom of a wooden spoon to crush the mint and lime together, releasing the juices and oils.
Add strawberries and crush slightly.
Pour in the rum, ice, and stevia, and use a spoon to stir. Top off with La Croix and serve garnished with an additional sprig of mint, sliced strawberries, and/or lime slice.