Instructions

1. Preheat oven to 400°F. Cook bacon in a large ovenproof skillet over medium heat.
2. Remove from skillet; drain on paper towels, reserving 2 Tbsp drippings in a bowl.
3. Add ½ Tbsp reserved drippings to skillet; heat over medium heat.
4. Add shallot and garlic; sauté 3 minutes. Gradually stir in spinach until wilted.
5. Stir in tomatoes, basil, lemon rind, lemon juice, ¼ tsp each salt and pepper, and bacon; cool slightly.
6. Spread bacon mixture over flank steak, leaving a ½-inch border on all sides.
7. Starting with 1 long side, roll up steak, jelly-roll fashion; tie with kitchen string at 2-inch intervals.
8. Wipe skillet clean. Heat remaining drippings in pan over medium-high heat.
9. Add steak; cook 4 minutes per side or until browned. Transfer skillet to oven.
10. Bake 15 to 20 minutes or until a meat thermometer inserted into thickest portion reads 135°F.
11. Let stand 10 minutes. Remove string to slice.