Heat water until it boils completely.
Make sure it's very hot and bubbling.
Pour gelatin powder into your large bowl.
Add the boiling water slowly.
Stir well for 2 minutes until dissolved.
Pour in the cold water next.
Mix everything together thoroughly.
This helps it set properly.
If using fresh strawberries, add them now.
They make it look extra pretty.
Stir gently to distribute them evenly.
Pour mixture into your glass dish carefully.
Place it in the refrigerator immediately.
Let it chill for 4 hours minimum.
Touch the gelatin gently to check firmness.
It should jiggle but not stick.
Cut into squares and serve cold!