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1
In a small bowl, mix aioli ingredients. Refrigerate, covered, until serving.
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2
Preheat oven to 375u00b0. In a small bowl, whisk marinade ingredients until blended. Place mushrooms in a 13x9-in. baking dish; drizzle with 1/4 cup marinade. Bake, covered, 35-40 minutes or until tender. Remove from baking dish; cool slightly. Cut into 1/2-in. strips.
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3
In a large skillet, heat 2 tablespoons oil over medium heat. Add red onions; cook and stir 8-10 minutes or until softened. Reduce heat to medium-low; cook 30-40 minutes or until deep golden brown, stirring occasionally. Add remaining marinade; cook 4-6 minutes or until onions are glazed, stirring occasionally.
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4
Place red peppers on a foil-lined
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5
. Broil 4 in. from heat until skins blister, about 5 minutes. With tongs, rotate peppers a quarter turn. Broil and rotate until all sides are blistered and blackened. Immediately place peppers in a bowl; let stand, covered, 20 minutes.
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6
Peel off and discard charred skin from peppers. Remove stems and seeds. Chop peppers; return to bowl. Add green onions, basil, garlic, salt, pepper and 1 tablespoon oil. Toss to combine.
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7
Place baguette slices on ungreased
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8
; brush with remaining oil. Bake at 375u00b0 for 4-6 minutes on each side or until golden brown.
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9
To serve, top toasts with mushrooms, arugula, onions and pepper mixture. Bake 5-8 minutes longer or until heated through. Drizzle with aioli.
