2/3 c. olive oil
1/2 c. red wine vinegar
1 clove garlic, crushed
1 tsp. oregano
1/2 tsp. sugar
1/2 tsp. salt
1/2 tsp. pepper
1 tsp. lemon juice

Clean mushrooms (chop or slice). Marinate 12 hours or overnight. This will do 2 large boxes of mushrooms.