Remove the stems from the strawberries and place them in a blender. Drizzle a bit of honey or agave if you want to sweeten them up a bit. This is optional, and if your berries are very sweet, you can skip additional sweetener. Blend until smooth.
Pour the strawberry puree onto a baking sheet lined with parchment paper. Use a spoon or spatula to spread the mixture in a completely even layer. You don't want the mixture to be too thin or too thick - this is where the experimenting comes in to play!
Set the oven temperature to 250F degrees, and bake the fruit leather for 2-3 hours, until it is dry to the touch, and no longer sticky. Cooking times will vary depending on your particular oven and how thick you spread the mixture. The fruit leather will feel stiff when it comes out of the oven. Allow it to sit at room temperature to soften, about 2 hours (I have had best results when I've let it soften overnight).
Keeping the fruit leather on the parchment paper, cut it into strips and roll up. Fruit leather can be stored at room temperature for a few months, although we never let ours sit around that long!