Tuna Puttanesca - Today's Parent

Ingredients

• 1 tsp olive oil
• 1 garlic clove, minced
• 1/4 tsp hot-pepper flakes, optional
• 1 796-mL can whole plum tomatoes
• 1/4 cup black olives, pitted and coarsely chopped
• 2 tbsp capers, coarsely chopped (optional)
• 1/2 450-g pkg rigatoni pasta
• 2 170-g cans chunk tuna, preferably packed in oil
• 4 cup packed baby spinach