Mrs. Waterman's Stuffed Mushrooms

INGREDIENTS

• 20 to 24 large white mushrooms, wiped clean with a damp paper towel, stems removed and finely chopped
• 1 small onion, finely chopped
• ½ green pepper, finely chopped
• 2 cloves garlic, minced
• 3 tablespoons unsalted butter
• ¾ cup crushed Ritz crackers
• ½ cup finely chopped pepperoni
• ½ cup grated Romano cheese
• 1 tablespoon dried parsley
• 1 teaspoon dried oregano
• 1 teaspoon seasoned salt
• ¼ teaspoon black pepper