INSTRUCTIONS
Preheat oven to 400 degrees F. Split buns and lay them cut side up on a large baking tray (15×21). Lightly brush the cut sides with softened butter or mayonnaise (optional for crispier/more flavorful buns). Bake for 5 minutes to toast the buns.
Meanwhile you can continue with the recipe:Heat 1 tablespoon olive oil in a large cast iron skillet over medium-high heat. Add beef, onions and bell peppers and cook until beef is browned and onions are softened, about 7 minutes. Add garlic, and sauté 30 seconds.
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