Grilled Portabella And Brie Burgers

• 1/4 cup Italian salad dressing
• 4 large portabella mushroom caps
• 4 slices sweet onions, one slice for each burger slice thick
• 2 tablespoons prepared pesto sauce
• 1 tablespoon mayonnaise
• 4 sandwich buns, split and lightly toasted
• 4 ounces fresh spinach leaves
• 2 tomatoes, sliced
• 4 ounces ripe brie cheese, rind removed, at room temperature

1. Prepare grill or preheat grill pan. Brush salad dressing on both sides of the portobello caps and onion slices. Grill portobellos and onions on both sides until mushrooms soften and onions are lightly browned; drain portobellos well on paper towels. Combine pesto and mayonnaise in a small bowl.
2. To assemble burgers: Spread pesto mayonnaise on bottom halves of rolls; top with spinach, tomato, grilled onions, and portobellos. Spread top halves of rolls with Brie and place on burgers.

italian salad dressing, portabella mushroom, sweet onions, pesto sauce, mayonnaise, buns, fresh spinach leaves, tomatoes, brie cheese

Taken from www.food.com/recipe/grilled-portabella-and-brie-burgers-154339 (may not work)