Florentine Pork in French Bread Boats

2 pork tenderloins, about 12 ounces each
1/3 cup Italian dressing
1 teaspoon vegetable oil
2 medium tomatoes, seeded and diced
1 bag (10 ounces) fresh spinach, washed and trimmed
3 (6-inch) pieces French bread, split lengthwise in half
6 teaspoons grated Parmesan cheese

Cut pork into slices 1/4-inch thick. Place pork in plastic bag; add dressing, turning to coat. Tie bag securely and marinate at least 15 minutes (no longer than 1 1/2 hours).
Remove pork from marinade.
Brown pork in oil in nonstick skillet; pour off drippings. Add tomatoes and spinach. Cover tightly and cook over medium-high heat 2 to 3 minutes or until spinach is wilted. Pour off liquid.
Meanwhile remove soft centers from bread to form "boats".
Spoon 1 cup pork mixture into each boat. Sprinkle each with equal amount of cheese.
Serves 6

Source: http://www.cooksrecipes.com/pork/florentine_pork_in_french_bread_boats_recipe.html