Heat oil in a large skillet over medium-high heat. Add bacon and cook, turning once, until crisp, about 6 minutes. Remove from the skillet and arrange on a paper-towel-lined plate. Spread butter on one side of bread slices. Layer bacon, spinach and tomato slices on buttered side of one bread slice. Top with remaining bread, buttered-side down, and serve.
Per Serving: Serving size: 1 sandwich, 470 calories (290 from fat), 32g total fat, 10g saturated fat, 95mg cholesterol, 1260mg sodium, 26g carbohydrates, (5 g dietary fiber, 6g sugar), 20g protein.
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