Step 1

Wash and slice the strawberries, removing the hulls and green tops.

Step 2

Add them to a saucepan, and mix the sugar in well.

Step 3

Stir continually over medium heat, and bring the strawberries to boil.

Step 4

Once boiling, add the lemon juice and zest (if using).

Step 5

Boil for about 15 minutes, or until the jam reaches 220F.

Step 6

Stir often, to make sure the jam doesn’t burn.

Step 7

Pour into a jar and allow to cool.

Step 8

Cover and refrigerate.

Step 9

Use within about 2 weeks (if it lasts that long).