Mango Jelly Sandwich 8 ounces (1 cup) fresh mango puree 1/4 cup raw, local honey 2 teaspoons lemon juice 1 tablespoon fine ground flaxseed meal Takes , serves . In a medium saucepan over medium-high heat, combine the mango puree, honey and lemon juice. Bring to a rolling boil, stirring constantly. Boil for 1 minute. Turn off the heat and stir in the flax meal. Let cool uncovered in the fridge until set, at least 6 hours.