Meanwhile, in large skillet cook bacon over medium heat until crisp. Drain; reserve drippings in skillet. Crumble bacon and set aside. Remove 2 tablespoons drippings for dressing. Add tuna to skillet; cook over medium-high heat 3 minutes per side or until slightly pink in center. Transfer to cutting board; cover and keep warm. Slice before serving.
Wipe skillet clean. Whisk in reserved drippings, vinegar, honey, and mustard to skillet. Bring to boiling.
Line plates with spinach. Top with sliced tuna, crumbled bacon, and the eggs. Drizzle dressing. Sprinkle pepper. Makes 4 servings