Sweet Onion-Lemon Butter Canapes

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   ["Scrub lemon.", "Grate zest.", "Combine in bowl with butter and honey and whip with wooden spoon until pale and fluffy.", "Halve lemon and squeeze 1 tablespoon juice.", "Whip into butter, a teaspoon at a time.", "With sharp bread knife, slice crust from all sides of the loaf, trimming to make a neat rectangle.", "Cut lengthwise into slices about 1/4 inch thick (8 long rectangles).", "Lay 4 slices side by side on each of two cutting boards.", "Scoop a tablespoon of butter onto each slice.", "With flexible spatula, spread evenly to edges.", "Chill.", "Quarter onion, cutting through ""poles.""

* Per serving · 4 servings · Values may vary.