Ingredients

AIOLI:1/3 cup mayonnaise1 garlic clove, minced1-1/2 teaspoons lemon juice1-1/2 teaspoons balsamic vinegar1 teaspoon minced fresh rosemary1 teaspoon Dijon mustardMARINADE:1/4 cup packed brown sugar1/4 cup balsamic vinegar1/4 cup honey4 teaspoons minced fresh thyme or 1 teaspoon dried thymeBRUSCHETTA:6 large portobello mushrooms, stems and gills removed1/2 cup olive oil, divided3 medium red onions, halved and thinly sliced2 large sweet red peppers3 tablespoons thinly sliced green onions3 tablespoons minced fresh basil1 garlic clove, minced1/4 teaspoon salt1/8 teaspoon pepper24 slices French bread baguette (1/4-inch thick)1 cup fresh arugula

Preparation

In a small bowl, mix aioli ingredients. Refrigerate, covered, until serving.

Preheat oven to 375°. 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.

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.

Place red peppers on a foil-lined baking sheet. 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.

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.

Place baguette slices on ungreased baking sheets; brush with remaining oil. Bake at 375° for 4-6 minutes on each side or until golden brown.

To serve, top toasts with mushrooms, arugula, onions and pepper mixture. Bake 5-8 minutes longer or until heated through. Drizzle with aioli.