To a small blender, add 1 cup of roughly chopped watemelon.
Blend until smooth.
Pour the juice into a small colander placed over a bowl. Use the back of a spoon to press the liquid through.
To Make a Watermelon Mimosa
Add about 1/4 cup of watermelon juice to a glass.
Top with equal parts sparkling wine.
Notes
If you need to jazz up the flavor a bit try a squeeze of lemon.You can use any type of sparkling wine including champagne, prosecco, cava, etc.The typical ratio for watermelon mimosas is equal parts juice and wine. But you can modify it to suit your own flavor preferences.