1 package (16 oz.) prepared polenta, cut into 1/4-inch-thick slices
Preheat oven to 375°.
Heat Olive Oil in 12-inch nonstick skillet over medium heat and cook garlic 30 seconds. Stir in spinach and cook, stirring frequently, 5 minutes. Stir in Sauce and red pepper flakes. Bring to a boil over high heat. Reduce heat to low and simmer, stirring occasionally, 5 minutes or until heated through. Season, if desired, with salt and pepper.
Arrange polenta on baking sheet, then evenly top each slice with spinach mixture. Bake 10 minutes.