Last fall I made some apple butter that was delicious. So I decided to give some strawberry jam a try. I cut the stems off of the berries, rinsed them and cut them in fourths. I mashed them with a potato masher then put them in a pot on the stove. I had about 7 cups of mashed strawberries. To that I added 5 cups of white sugar and about 1/3 cup lemon juice. I stirred the mixture on low until the sugar dissolved then brought it to a full boil. When the strawberry mixture reached 220 degrees I put it into the jars, put on lids and rings and set it aside to "seal."