Combine chopped rhubarb, sugar and berries in heavy saucepan. On low heat, stir until it begins to make its own juice. Bring to a boil, stirring occasionally and boil exactly 15 minutes. Time carefully after full boil is reached. Remove from heat and sitr in jello powder. Put in jars and seal with melted paraffin. This jam may also be frozen without sealing or will keep in the refrigerator for several months. Yields 4 cups.
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