Categories: Burgers

Ingredients

• 2 teaspoons extra-virgin olive oil
• 1 cup finely chopped sweet onion
• 1/2 cup chopped red bell pepper
• 1/2 cup chopped green bell pepper
• 1/2 cup chopped cremini mushrooms
• 1 teaspoon Worcestershire sauce
• 1/4 teaspoon minced fresh thyme
• 1/4 teaspoon kosher salt
• 1/4 teaspoon black pepper
• 12 ounces 90% lean ground sirloin
• Cooking spray
• 1 ounce reduced-fat provolone cheese, shredded (about 1/4 cup)
• 8 (1-ounce) slider buns

Directions

1. Preheat broiler.

2. Heat oil in a large skillet over medium-high heat. Add onion, bell peppers, and mushrooms; sauté 5 minutes. Combine onion mixture and next 5 ingredients (through beef) in a bowl. Shape beef mixture into 8 (1/3-inch-thick) patties.

3. Heat a grill pan over high heat; coat with cooking spray. Cook patties 3 minutes; turn, top with cheese, and cook 2 minutes.

4. Arrange buns, cut sides up, on a baking sheet; broil 30 seconds. Assemble sandwiches.

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