Ingredients

• 4 tablespoons butter (can use less butter if desired)
• 2 cups sliced fresh mushrooms
• 1 medium onion, finely chopped
• 1 -2 tablespoon fresh minced garlic (or to taste)
• 1 small red bell pepper, seeded and finely chopped
• 1 teaspoon dried thyme
• 1/2 teaspoon crushed red pepper flakes (optional or adjust to heat level, we like spicy so use lots!)
• 1 1/4 lbs lean ground beef
• 1 1/4 cups Italian seasoned breadcrumbs
• 1/2 cup grated parmesan cheese
• 1/2 cup plain yogurt
• 1/4 cup ketchup or 1/4 cup chili sauce
• 1 tablespoon Worcestershire sauce
• 8 ounces cheddar cheese, finely diced
• 1 teaspoon fresh black pepper (or to taste)
• 1 large egg, slightly beaten
• 1 teaspoon season salt (or to taste, I use seasoned salt)