COOK bacon in large skillet on medium-high heat for 5 min. or until crisp, stirring occasionally. Drain bacon and set it aside for later use. Add onion and garlic to the skillet; cook and stir 2 min.
ADD spinach; stir. Reduce heat to medium; cook 3 min., stirring frequently. Add tomatoes and seasoning; cook an additional 5 min., stirring occasionally
PLACE warm spaghetti in a large bowl; top with sauce. Sprinkle with the cheese and reserved bacon.