Heat oil in a large skillet over medium high heat. Add bacon and cook until crisp, turning once. Meanwhile, butter both slices of bread. Layer bacon, spinach, and tomatoes onto one slice of the bread. Top with the remaining slice of bread and serve.
Nutritional Info:
Per Serving:Serving size: 1 sandwich, 540 calories (340 from fat), 38g total fat, 12g saturated fat, 120mg cholesterol, 1610mg sodium, 27g carbohydrate (5g dietary fiber, 6g sugar), 25g protein