shrimp-stuffed portobello mushrooms

Ingredients For shrimp-stuffed portobello mushrooms

• 1/4 c

  olive oli
• 1/2 c

  onion, chopped
• 1/4 c

  fresh basil, chopped
• 3

  large garlic cloves, minced
• 1/2 tsp

  fresh rosemary, chopped
• 6 oz

  peeled cooked shrimp (or 8 oz lump crab meat)
• 2/3 c

  fresh bread crumbs
• 1/2 c

  parmesan cheese, grated
• 1/4 c

  mayonnaise
• 1/2 tsp

  cayenne pepper
• 8

  portobello mushrooms (2 to 2-1/2" with gills removed)
• salt & pepper to taste