Mini Philly Cheeseburgers

Ingredients

• 0.3 teaspoon pepper black
• 0.5 cup cremini mushrooms chopped
• 0.3 teaspoon thyme leaves fresh minced
• 0.5 cup bell pepper green chopped
• 12 ounces ground sirloin 90% lean
• 0.3 teaspoon kosher salt 
• 2 teaspoons olive oil extra-virgin
• 0.3 cup provolone cheese shredded reduced-fat
• 0.5 cup bell pepper red chopped
• 1 ounce slider buns 
• 1 cup onion sweet finely chopped
• 1 teaspoon worcestershire sauce 

Equipment

• bowl
• frying pan
• baking sheet
• broiler
• grill pan

Directions

1. Preheat broiler.
2. Heat oil in a large skillet over medium-high heat.
3. Add onion, bell peppers, and mushrooms; saut 5 minutes.
4. Combine onion mixture and next 5 ingredients (through beef) in a bowl. Shape beef mixture into 8 (1/3-inch-thick) patties.
5. Heat a grill pan over high heat; coat with cooking spray. Cook patties 3 minutes; turn, top with cheese, and cook 2 minutes.
6. Arrange buns, cut sides up, on a baking sheet; broil 30 seconds. Assemble sandwiches.