Wash all your berries in a lukewarm bath with 1 cup white vinegar and 2 tsp baking soda. Remove all the tops and fleshy, white centers. Place in a food processor or blender and blend until smooth.
Mix strawberries, lemon juice, and sugar in a large pot at medium-high heat. Stir constantly to keep from burning. Allow to come to a boil, then reduce heat. Simmer for three minutes on low-medium heat.
Place jam in clean, sterilized jars (SEE NOTE 2). Screw lids tightly on jars. Allow to rest for 8 hours on the countertop. Place sealed jars in the refrigerator to store for up to six months.
Notes
NOTE ONE: One cup of sugar per pound of strawberries is recommended. However, if you prefer less sugar you can reduce it by one cup. Your jam may be slightly more runny. NOTE TWO: To sterilize your jars, boil them, fully submerged in water for about 2 minutes. Remove carefully.
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