1. Let the frozen strawberries thaw for a few minutes so they are easier to blend. Fresh strawberries can also be used, but for a soft-serve texture they should be frozen for a few hours beforehand.
2. Add the strawberries, skyr, milk, whey protein, lemon juice and sweetener to a strong blender and blend until smooth and creamy.
3. For a soft-serve texture, serve immediately.
4. For firmer ice cream, transfer the mixture to a shallow container and freeze for 2–4 hours. Stir every 30–45 minutes to keep the texture creamier and reduce ice crystals. Let it sit at room temperature for 5–10 minutes before serving.
Optionally, add a small amount of xanthan gum or guar gum to improve creaminess and help prevent the ice cream from becoming too icy.