Ingredients

• 1 tablespoon minced fresh oregano or 1 teaspoon dry oregano leaves
• 1 -2 tablespoon pureed canned chipotle chile in adobo, depending on spiciness desired
• 2 tablespoons minced garlic
• 1/2 cup olive oil
• 1/3 cup fresh lime juice
• 1 lime, thinly sliced into circles
• 2 teaspoons salt
• 1 small red onion, halved lengthwise, then very thinly sliced into half moons
• 2 lbs very button mushrooms (or medium mushrooms, halved)
• 1/4 cup coarsely chopped Italian parsley