1 lb. lg. mushrooms (wash, dry, remove stems)
1 lb. bacon, fried
1 lg. onion, finely chopped (don't grate)
Salt, pepper & a little Worcestershire sauce
Mayonnaise
Grated Cheddar cheese

Crumble bacon. Add onion, salt, pepper, Worcestershire sauce and enough mayonnaise to hold mixture together. (If too runny, add a few bread crumbs.) Spoon into clean and prepared mushrooms. Top with grated Cheddar cheese. Bake at 350 degrees for 15 minutes.