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["MAKE MOUSSE:", "1) Put oven rack in middle position and preheat oven to 300u00b0F.", "", "2) Cook onion in 2 T butter in a small heavy saucepan over moderately low heat, covered, stirring occasionally, until translucent, 5-7 mins. Stir in garlic and cream and simmer, covered, until onion is tender, about 6 mins.", "", "3) Remove from heat and stir in remaining 1 3/4 sticks butter, then return to heat and stir until butter is melted and mixture is combined.", "", "4) Puree livers with onion mixture, sea salt, and pepper in a blender, scraping down sides as necessary, until smooth. Force mixture through a fine-mesh sieve into a large measuring cup. Bring a teakettle full of water to a boil.", "", "5) Evenly space ramekins in a 13x9"" roasting pan. Divide liver mixture among ramekins, then cover each ramekin with foil and place roasting pan in oven. Pour enough boiling water into pan to fill pan halfway.", "", "6) Bake until mousse is just set, about 30 mins. Remove foil and transfer ramekins to a rack to cool to room temperature, about 1 hour, then chill mousse, covered, at least 3 hours.", "", "PREPARE GELEE ONCE MOUSSE IS COLD:", "7) Chop half of cucumber and reserve remainder for another use. Puree chopped cucumber in a food processor until liquefied. Pour through a fine-mesh sieve into a liquid measuring cup (You should have 1/2 cup cucumber water. If not, chop and puree more cucumber.)", "", "8) Sprinkle gelatin over 1/4 cup cucumber water in a small saucepan and let stand 1 minute to allow gelatin to soften. Heat gelatin mixture over low heat, swirling pan, until gelatin is liquefied, then remove from heat and stir in lemon juice, sugar, Tabasco (to taste), parsley, and remaining 1/4 cup cucumber water until sugar is dissolved.", "", "9) Cool gelee 5 mins, then spoon about 2 tablespoons over each mousse. Chill until gelee is set, about 1 hour.", "", "10) Bring mousse to room temperature, about 30 mins, before serving.", "", "COOKS' NOTE: Baked mousse with gelee can be chilled up to 3 days."]
