Grilled Stuffed Portabella Mushrooms

• 4 portabella mushrooms
• 1 cup balsamic vinegar
• 1 tbsp. Dijon mustard
• 1 tsp. pepper flakes
• 1/2 tsp. fresh cracked pepper
• 1 md. red bell pepper, finely diced
• 1 lg. onion, finely diced
• 4 oz. aged cheddar cheese, sliced

1. Prepare the portabella mushrooms by cleaning the caps, removing the stems and scooping out the gills.
2. Mix together the vinegar, mustard and pepper.
3. Place mushrooms in a plastic bag and cover with the vinegar mixture.
4. Let marinade for 4 hours.
5. Preheat grill.
6. Saute red bell pepper and onion in olive oil until onions are caramelized and red peppers are slightly charred.
7. Preheat oven to 350F.
8. Place mushrooms on grill and cook until lightly charred on each side.
9. Remove mushrooms to a cookie sheet and place top-side down.
10. Fill the gill area of the mushrooms with the sauteed bell pepper and onion.
11. Cover each pepper with 1 oz.
12. of sliced cheddar cheese.
13. Top with freshly cracked pepper.
14. Place in the oven for 5 minutes.

portabella mushrooms, balsamic vinegar, mustard, pepper, fresh cracked pepper, red bell pepper, onion, cheddar cheese

Taken from www.foodgeeks.com/recipes/19027 (may not work)