Follow these steps to create your refreshing Watermelon Slushie:

1. Prepare the Watermelon: Start by cutting the watermelon into cubes. Ensure to remove any seeds if you are using a type with seeds.
2. Chill the Watermelon (Optional): For extra refreshment, you can freeze the watermelon cubes for about 1-2 hours prior to blending.
3. Combine Ingredients: In a blender, add the watermelon cubes, fresh lime juice, and optional honey or agave syrup.
4. Blend: Blend on high speed until the mixture is smooth and slushy in consistency. Add ice cubes if you prefer a firmer texture.
5. Taste and Adjust: Check the sweetness level. If desired, add more honey/agave and blend again.
6. Garnish: Pour the slushie into glasses and garnish with fresh mint leaves.
7. Serve Immediately: For the best texture and taste, enjoy the slushie right after blending.

These straightforward steps will enable you to create an incredible Watermelon Slushie ready to satisfy your thirst!